@mavica_again I wonder if cleaning was an extra charge at that service center.
@arielmt they just dumped a generic belt on top of the old belt's gunk and called it a day
even the day i got this the wobble was already unusable
either they did it themselves badly, or got scammed and passed the scam forward
cleaned up all the belt gunk, gave each wheel a drop of oil just for good measure, installed new proper belt, wobble is gone