Hyundai doesn’t find mistakes! What to do?

Hello, As I have already reported in another thread, I often have a clapping while steering. Now I was altogether 5 times at a Hyundai workshop without success and today I was also with another without success. Now I wanted to ask if there is a special workshop or specialists at Hyundai who are really looking for until a mistake is found. The problem with the normal contract workshops is that they are only out for profit and not looking for long. It would Also help me if someone with his Hyundai Tucson (from 2015) already had an exchange of the steering gear and/or the steering and could tell me where this was done. Thank you for your answers