I ran out of attempts to unlock the sterio on 2000 astra,what do i do now.any help would be great.

Have you tried this?
Common problem. The safe message comes up when someone has input the wrong code.

There is an internal reset timer between each incorrect code input, this only starts to count down when theradio is powered up. Turn the power off before the timer runs down and you have to start again!

After the 3rd incorrect code you wait 10 mins, and then it doubles each time up to 640 mins for the 9th incorrect code!!

Simplest answer is drive around for a while (don't stall it!) until the display changes to 1 number followed by ----

Now simply press the number 1 on the radio until you get the first digit, it cycles round so if you miss the number you want just keep going until it comes round again.
Now use button number 2 for the second number, button 3 for the 3rd and button 4 for the fourth.

When you have the correct code, press and hold the AS button until you hear a bleep. Now it should be working.
Hope this helps.