no message left - telemarketing?

This number called our business and asked for the owner, who was not in the office. The lady was rude went "hmph" and hung up. Very un-professional, if they were trying to garner business this is not a way to get a call through the next time they try calling.

MSI Canada selling 'cheaper' MasterCard and Visa rates.  What's going on since we have had about 10 of these calls in the past 6 months?

When I answered the call, there was a delay and I became suspicious. I was about to hang up when a female greeted me. Her question was, if we accept credit cards. I told her that I was not interested and that we are happy with our merchant company. She questioned my reaction, how I knew what she wanted. She said that she may want to bring in her car to our shop. Knowing the phone number was not from our province I asked her, where she was calling from. She said that she is using a server and she then acted, as if she was a customer, upset at my service. She hung up!
They really start to play a stupid game, just to get there foot into your business!

Lady asked to speak to owner. I told her now, but would like to be removed from her calling list. She told me "There is no list, so [***] You".