Having problem to replace the trunklock in my oktaviaII. My torxbit makes the bolthole round. I could use some help.

//ola

Use a hacksaw blade and cut a slot and use a large flat screwdriver. Or drill it and use a screw extractor, or just drill it out completely.

 

Next time use a good quality torx key of the correct size, it should be a snug fit and get it to the bottom of the hole before turning. Those bolts arent in very tight.