Mercedes benz poor service delivery

I have bought a new mercedes a250 amg 2018, i have been experiencing issues with loud squeaking whenever i brake, i notified the dealer first at 5 000 km they stated that its normal as its new brakes as soon as i drive it it will become much better, then it got worse at around 12-15000 kms i notified them again and they stated that they are ordering new brakes for me which will resolve the issue, i then qaited for the new brakes, a few days later the same issue i had to take the car back in for checking up on it, i took it in and the same issue occurred again, i then to the car in for my first service and notified the service department of the issue i am experiencing they stated they will sort it out, i took the car home after tje service and contacted the service manager as the same issue occurred a day later he said bring thw car in again and well will check it i did not go as i actually sick and tired of going back and forth to the dealer they need to come up with a resolution as this is pathetic service from a premium brand i owned 3 vws prior and none gave me this problem and its sad that i have to compare a Mercedes to a vw, i honesty don't know what Mercedes os going to do but i hope my issue gets resolved as i am really exhausted getting up 4am in the morning rushing through traffic to Mercedes benz Pinetown and coming home and still having the same issue.