Crossbar screw is stuck. Which tool to pull out.

The transverse handlebar screw on the Audi A6 is so fixed that it has more than 200 newtonmeters of torque before it goes back again, can be rotated at a maximum of 90° and then starts to become crooked. Unfortunately, I already sunk the thread, and I don’t know which tool I should pull the screw out of the head now. With the Meiselhammer it doesn’t go any further because the angle is not right and also with a huge hammer with 2.5 joules impact force the screw no more millimeters go out t. Drilling doesn’t work either because no access fender blocks the angle. I know all the common methods like pulling out on the thread with the press-air hammer or any expressions, all this can’t be done, I need a tool to pull out