My mother told me about some phone calls that they have been getting back to back, when they answer it sound like a fax machine. My dad reported to the phone company and nothing had been done. Who can I call to talk to someone about the problem?

Fraudulent wire transfer requests were faxed from this number

I keep getting calls from this number also. It is always a fax. When I try and call back, its always busy. Its always to my business mobil phone.from what I read here, im glad It doesnt come through my fax.