A HUGE DISAPPOINTMENT

I took my vw polo in for a major service which was done. I collected the vehicle and a week later the vehicle would not start. I was stranded and had to arrange towing of the vehicle. I took my vehicle in to a repairer who informed me that VW when conducting the major service cross threaded the bolt on my alternator which caused there to be less power going through. I contacted vw and before speaking to the service manager i asked the consultant to first confirm if vw had opened the bolt on the alternator which she confirmed they did i then informed of what had happened and spoke to the service manager who immediately was defensive and stated that he will "investigate the matter" and let me know. I DID NOT EVEN GET AN APOLOGY . Well its been months and i did not hear. Pathetic service and pathetic workmanship. I will never take my vehicle here again. ABSOLUTELY DISGUSTED.