Instead of calling in for support, try SAMSUNG Experience Store, that have in house service.
I took my S10+ to a SAMSUNG service centre and they couldn't help me with my Thumb Prints that cause a permanent Mark's on the display. I posted the issue here.
Anyways, they said it would cost $350 CAN and advised me to call SAMSUNG to see what they could do. It was a PITA over the phone he kept insisting going to my nearest service repair, I told them I did and they not only I have to cover the shipping but if they find it's not a manufacturing defect it will cost me $50 for basically wasting their time. That was the end of that.
I was lucky when I pre-ordered my Note 10+ at the SES I told them about my S10+ and said it was covered under warranty and should take 10 days since parts wasn't available. I was very happy.
Unless it's a manufacturing defect, like my S7 edge that had a dead pixel, they don't seem to be very helpful.
No questions ask at SAMSUNG Experience Store.