AUTO BAVARIA MIDRAND, WORST SERVICE CENTRE

HI I have had the worst service possible from this service centre, their attitude and customer service is shocking. My car has been to this dealership for almost 4 visits on the same problems,to date they cannot sort the issues out but too quick to say bring it back at your own cost and convenience yet its their mess up, they cannot fix simple issues i wonder how these guys repair serious problems, every time my car goes there it comes back with the same problems how pathetic is that.