Received call a few minutes ago. No message left

This number calls my home business line and then immediately calls our home line ...never leaves a message ... just keep calling, pretty much once a day.  :(

Answered phone, said hello 3 times ,computer said goodby End of call n.

***DANGER** Caller on other end (CID said Pocatello, ID) has a thick indian accent and was trying to tell me that he was my computer provider and that whenever I logged onto my computer it was downloading unwanted files. Tried to instruct me to go to my computer and turn it on and he would instruct me on how to fix it. When I told him he can't be my computer provider because I built my own computer he hung up.