shop tells me i have frame damage!!

[PersianLegacy]

so i had to take my lady Z to fire stone in my town for an alignment.

i recently put 20mm H&R bolt on spacers on the rear, and soon after my alignment was a mess. did a lot of research and reading and i came to the conclusion that the alignment could go out of spec if you install spacers but not by this much!!!!!

My rear driver side wheel was at -3.7!!!

the rear passenger side was off too but not that bad.

The dude was telling me that he could only push it out 1 degree since thats how much the bolt allows for. then he goes on and tells me that something wrong with the rear, that i might have frame damage or something is bent.

Now this is not my daily driving car. in the past 2 months i might have put 5k miles on it tops. I have not hit any pot holes to bent my frame or anything in the rear! i have not been in an accident, i dont drive the car like fast and furious style, and do not track it.

so l left his shop with the rear driver side tire at -2.7.

any ideas? any suggestions? my rear tire is shot so i bought new tires and dont want to put them on cause it will just wear the hell out of them...

thanks.