Mine had been fine since the 1 December update in regards to charging.
Is the charging port clean too ?
Although I appreciate you say you've tried a Samsung Wireless Charger.
Hopefully your phone will have been backing up automatically via Samsung Cloud.
A Service Centre won't retain any information on your phone and will factory reset it as part of the troubleshooting process they'll use.
I wish you all the best with this.
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "