Very dissapointed customer

I'm very dissapointed with the service I receive from VW Wonderboom. I have taken my car 4 times in 2/3 months for scratching and other weird sounds coming from the front wheels . The car would be ok for few days then start again. I'm not sure how the guys are identifying the problem/ issues with these weird sounds and fixing the problem but it seems like what they are doing does not solve the problem. Can you please kindly look into this matter