My seat belt is stuck while the seat in my wagon is down. how do I get it unstuck?

No the seat belt gears are damaged

quite easy ,just pull the back of the seat down then slam it hard back again .2/3 times usually does the trick

Its stuck or the spring is sprung. Remove the panel and access the belt and see what the problem is. Most times (98%) the belt is stuck and only needs to be unstuck. If thats is not it then replace part.

possibly there is something stuck in the belt not letting it retract

This is going to sound a little odd, but properly jack the car and then try opening this door. Put the jack in the recommended jacking spot on the passenger side.

Imagine that the back and front ends of the car are compressing the center of the car. By lifting one end or the other, the center may shift. Otherwise you do not have a frame, but the engine cradle may have a support located closer to the center of the vehicle. Do not jack the sheet metal, but you may catch the cradle and apply lift there.

You may notice by putting in a piece of cardboard in the doorjam on whether there is an increasing gap as you jack the car.

move the seat back to release tension on the belt buckle and then undo it.
Does that help? If not reply.

Usually when they get stuck you can`t get them unstuck unless they are just twisted.seat belts are not repairable.Your best bet is to go to the salvage yard and get a used one and replace it.

More than likely, you have a broken wire or two between the body and the driver side front door. This is a very common issue with those cars when tey get older.

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

you will need new seat belt catch seat will come out and catch will be broken careful and you problem will be fixed so you will need new catch for seat belt