burn his shop errr house down to the ground.

jk, but you should give a bad review. I have seen at-home bike mechanics advertised on Austin CL, and it always sketches me out. I could probably do that, but I don't b/c I don't wanna be responsible in case I mess something up. Anyways, if you don't wanna do it yourself take it to a shop. A GOOD shop, because I have been to shops that have done dumber things than this (trying to remove cog w/ vice, not tightening crank arm bolt down enough, not greasing lockring threads)