Bad service

I took my car to volkswagen hatfield for the yearly service after I heard good things about this particular dealership..after I received my car back I noticed that the rubber car mats I bought with my own money was gone..this upsets me because I bought the rubber mats to put on top of the volkawagen mats so the original volkswagen mats do not get damaged or stained...I bought my car brand new and want to sell it one day in as good as possible condition..I told the guy that handed my car (Nic) over to me that the mats were missing and he went to go and look for them..he returned after a short while and stated that he was unable to find them and that they will keep looking and phone me the next day..I never received any phone call. After about a week a lady phoned my wife to get feedback on our experience and to rate the place, we gave a bad rating and explained the situation to her and she said that she will report it..I have STILL not received any feedback..because of the lack of communication from the dealership I decided to take the matter further...I am only expecting a refund for the cost of the mats or new mats..I just want to keep the original mats new so it does not have any affect on the price I sell my car for in the end..I hope to receive feedback if not I will take this matter even further..the car is on my wife's name, Samantha Taylor