What is Phone Number 615802805 And +43 800 640338?

Is anyone bothered is Phone Number 615802805 And +43 800 640338.
– Who is the owner of the phone number.. They call me constantly every day at 2021-11-26 11:49:29

Can someone tell me what to do with 615802805 And +43 800 640338 ?

6
I am very grateful for your help. Thank you!
Recent, Discussion at 2021-11-26 11:49:29 by anonymous : missed call alert