Replace camshaft adjuster?

Hello dear Volvo drivers, I have the following problem that seems to be an illness with Volvo. My Volvo V40 2.0L (136 hp, BJ 2001) is running up and running. According to the contract workshop, the noise came from the camshaft adjuster. I replaced it after a few days with a new (260€!), because I wanted to get rid of this noise. Unfortunately, the change somehow didn’t work, my Volvo is still racing. Does anyone have the problem? What did you do? Have used the part now and my prefer not to take it back now :O Greetings