Terrible service!

I brought my VW CC in for a fault on the back-right window mechanism and after I was told that the mechanism was replaced, I came to collect my car only to find that the fault was still there - the service guy didn't understand the problem in the first place. Then, I booked the car in again only to find that the new part still had not been ordered but I was told that the part will come that day and so I should leave the car with them. When I was told that the car is ready to be collected, I went there only to find that the fault still had not been fixed. Eventually, I had to physically show Willem what the problem was and then he went \aaaah, now I understand the problem.\" So, I asked him to order the correct part and call me when it is ready for me to book my car in. This was over a month ago and I still haven't heard from anyone at Lindsay Saker..."