Tier 1 is calling claiming we were overcharged for credit card processing. This is a scam

Got a call from so called Arthur. Called a few times and acted like a regulatory agent that was calling and notifying us we were being overcharged in processing fees then wanted a statement from us so he could make sure our processing  company was abiding by government regulations. Then to top it all off he offered us a rate of .05% guaranteed with no fees and contract. I told him that he is not true. He became very pushy and I simply declined. He has rudely called back and tries to put on the pressure. He just now called back and has a new number. 855-455-6851  Said the company name got switched from Venture Processing to Tier 1 Processing. FALSE and CORRUPT!  I would have to switch companies too if I was that much of a crook!
Don't give him a half second of your time! He is a SCAMMER!!!