Yeah these sort of phone calls can be a worry for elderly people. My
Mother keeps getting them and depsite how many many times I've told her
just to hang up the phone, she seems to think it's actually Microsoft
But yeah, demand to talk to their supervisor, ask them what country
they're calling from and what address is the office they're calling from
because you charge $9.95 per minute of your time to talk to them and
you'll have send them the invoice. It quickly stops them talking.