last year modern auto air installed a new compressor because my stock one locked up, a month ago the one they installed locked up, they installed another one after that, it as well broke, now they finally patched my car up and ive been driving it for maybe a week and a half this way (it stumbles and misses now, conveiniently as soon as i got it abck from their shop) and now my ac has gone warm....whatr should i do?