Frustrated Client

Had some work done on 2 of my cars just over a week ago by Netstar. Tried to start the one and found that the battery was dead, and when replaced - radiator fan stayed on permanently. Called Netstar customer center a week ago and they promised to inform the technician who has still not contacted me. I have tried the Cust Center a few times thereafter and just put on hold. I have not driven my car since Netstar worked on it. I have been a client for more than 15 years but am really shocked about this. I am not sure how to resolve now