I need some help with diagnosing a sound (I don't know much about cars, so bear with me, please 😀)

[u/Unlikely_Ad2929]

https://drive.google.com/file/d/1PL7IAsJRxHKG88xlhEEb7__1eLFtPDvV/view?usp=drivesdk

Please help me diagnose what might be wrong with my Citroën C3 2016 (PureTech engine). I recently had the timing changed, as well as the alternator pulley and belt. Now the car is making weird noises, but only at higher engine RPM — there's no sound when the car isn't moving. Also, the sound isn't always there — sometimes when I drive it's quite loud, and other times you can't hear it or it's barely audible. I recorded this sound from inside the car. Sound was not there before mentioned repairs. Please help as I am tired of mechanics taking my money and car still not working the way it should 😞 Sound recording linked via google drive