It's hard to tell from the pic, but the threads don't look damaged like they would from being cross-threaded. Bent from overtorquing maybe, but the threads appear intact.

I'd get a new set of bolts, replace the two that you've got out with the proper torque in order to relieve stress on the other three, then work on those one at a time.

If the new/replacement bolts thread in okay then they probably weren't "cross threaded."

Maybe try a micro-torch and some heat on the bolts. Be cautious with applying torque to a heated bolt since it may shear, and then you'd really be up a creek.

Possibly try an impact gun with slowly increasing torque settings with the wheel in the air (in gear, park brake fully engaged). The weight off the wheel may change the tension on the bolt.

All four tires or only one? After four years even having the manager consider helping is not too bad.