Iwatch Series 7, NOT receiving calls.

TRIED SOLUTIONS: I have tried two times doing the solutions that are provided in communities but the issue persists. It is fixed for a couple of days and then it goes back into not working. I have tried resetting it completely, unpairing and all other solutions. Iwatch is fully updated everything works fine etc.

ISSUE: Iwatch does not receive any calls all other notifications work perfectly.

Cannot believe my Iwatch series 3 NEVER gave me this issue. I am pretty sure this is a software problem more than hardware.

Literally just bought the Iwatch series 7 in February.

Please provide real solutions, I already tried all other solutions posted and they work for couple of days and then it goes back to not working.

Regards,