Pathetic Customer Service

Worst customer service ever!!! sent my car in for sorting out after they so called said they put new parts that i paid for but the same day i took my car back from them ,my car gave me the same issue then i called again they fetched the car and then they saying that the same part that i paid for is broken again...how is that possible and now they gave my car back with the problem being worst and saying that they cant do any for a brand new part they installed this is pathetic service from such a big brand, i don't recommend anyone to take there car in to them.