How do I release the rear seat belt that is stuck to the back of the chair

You can't it is not designed that way. The seatbelt mechanism is damaged and needs to be replaced.

Not quite sure what you mean by got around passenger seat. But if the seat is blocking the belt from retracting, then you only need to unbolt the seat from the floor enough to manipulate the belt around the seat. Or just completely unbolt it all the way, you just need a 14mm deep socket and a ratchet. But if you mean the belt just won't retract, then you'll need a new retractor assembly. I hope this info helps!

this is a ratchet seat belt, this is normal, it does this function for baby seats and capsules. Pull seat belt out all the way and then let it retract to disengage.

The problem:
The set belt stop has been lost so the seat belt retracts too far when the seat is laid flat. When laid flat the release mechanism locks as it should when not level so the seat cannot be raised up as the belt is too tight and locked.
The Solution:
1) Push the two little clips to release and remove the headrests.
Pull the grey lever on the right of the seat base, lift seat base up and forward toward the front seat..
2) See two red capped leversat the back of the two seat hinges and lever them to the upward position, this releases the seat.
Rock the very heavy seat unit upwards and lift complete unit upwards.
3) Take it out of the car and turn 180% so that the back of the seat and base are in the upward position and the seat belt will pull out as it should
4) Replace the missing belt locking stop (I used a tie pin permanently fixed using super glue).
5) Fold seat back down and test then either re-fit seat unit or leave out to decrease fuel consumption..

I just solved the problem for a stuck rear center seat belt in my 2002 Jetta.

Flip the base seat cushion forward against the front seat backs. Trace down along the belt to its tether point on the floor. The belt is sewn around a steel loop. The loop is anchored to a black steel hook. A thin silvery retainer plate is spring tensioned on top of the loop to prevent it from sliding off of the hook when the seat back is folded.

Therefore, you need to press the silvery retainer plate away from the hook (push up) to allow the loop to be slid from the hook. The belt was tight with the seat back in the upright position, so it was necessary to fold the seat back forward to create slack in the belt. Now push the belt loop towards the trunk and slide it off of the end of the hook (only possible with the retainer plate pushed up out of the way).

Now with total release of tension on the system via the bottom end of the seat belt being untethered and with the seat back returned to the upright position, normal extension and retraction of the belt will be reestablished. Next, simply extend the seat belt and slide the loop back into place over the floor hook. It snaps past the silvery retainer plate without all the effort required to hold the plate up during removal of the loop during disassembly.

Check again, the seat belt should be extending and retracting properly. Now just put the seat cushion back into regular position and you will be able to safely buckle up three people across the back seat.

It took about as long to do this repair as it has taken to post this answer to the problem. Note, the seat belt safety mechanism only allows normal extension and retraction of the belt when the seat back is upright.

haha we know you didnt do it on purpose, without seeing your problem and the hard to describe issue, i can only recommend to maybe try folding the seat to the cargo position, if that helps. if not, then you will more than likely need to disassemble the rear quarter panel, and unbolt the seat belt retractor from the body of the vehicle. sorry but there is no other way

The mechanism that allows it to retract is broken. Replace the seat belt.

it is you have to remove belt to get seat up the tab that keeps belt from retracting too far came off

you need to pull the belt out all the way to release it ,they have a locking mechanism for baby seats that stops them retracting,you pull them all the way out and they are reset and retract,common in modern cars,rare to give trouble

make sure that the rear seats are properly locked into rear catches as this can stop your seatbels from working if ok then sounds like your seatbelt is faulty req new seatbelt.