AC / Heat makes clicking noise before it cuts off

I Just recently got my car out the body shop and when I got it back my right turn signal had blown. Then I replaced it. Then I noticed a clicking sound like my turn signal was going by itself and it wasnt even on. Then I tried to turn my ac or heat on and it wouldnt cut on. It will only cut on during start ups. Its clicks then the ac off it clicks then its off etc etc. I dont know what to do