Worst after sale service ever.

I had electric widows installed in my car in June 2014. By October 2014 the motor on the driver side window failed and it took them until November 2014 to come check it and take it out to be fixed. It's March 2015 and still I've gotten no reply from them whether it's fixed or not. I phone them, no answer. Sent them e-mails everyday for a week, got one e-mail back that they'll let me know by Monday and that was Monday the 9th of March and I'm still waiting. And I can't drive to the workshop because they've moved to god knows where.