Scum bags keep calling & no answer

Called my cell phone and did not leave message.  I called back and it was a recording saying Jim from Business funding services.

Loan scam

Called twice and I did not answer. No message left

The person says that he has opportunity to upgrade the 2 credit card processing units in my office. I told him I don't have any, how could I have 2?

He then tried to sell me one.