Constant issues, worst dealership ever!

Worst service ever - the only reason we keep going back is for the convenience of them being close by. We put in a warranty claim on our first service and guess what, 3 services later and it still hasn't been sorted and we have received no feedback. Second service came around and the lock nut for the tyres just vanished, they obviously denied touching it and were unable to assist with removing the old original Ford set to put a new set on.Third service the vehicle came back with screeching brakes and a shudder when braking. Sent it back today only to be told that there's nothing wrong and there's nothing more they can do. What is the point of being a Ford dealership if you can't actually deal with the brand's vehicle's? The service advisor is so rude and she has no business being in customer service!