Caller tried to send fax to my home phone.  I called back and it is RPM collection agency. I don't owe anybody and tried to talk with someone and was put on hold for 15 minutes

keeps calling everyday twice a day

This number keeps calling me, like 3 phone calls in 4 hours. I dont know who this is.

For 3-4 days, have received 1 to 3 calls a day from this number. I let them all go to VM -- no message was left -- until the last. When I picked up, a robot voice said "I have a call for you, please hold while I connect you," but after a wait of 3-4 seconds, the call dropped. My phone is a land line, but my first thought was that this might be a robocall that transmits a virus or other malware into cell phones

My caller-ID said

RECEIVABLES PER
240-210-7110

I have no debts of any kind, so suspect this is some sort of scam, if as mentioned above, this is a collection agency.

I would really appreciate it if you quit calling, I do not appreciate calling also in the evening.I don't owe you any money and getting tired of you calling.!!