Problem is, you have to find them, and you have to sue them in their home town, not yours. You might me able to recoop your costs of the flight out there, though. Bigger problem is that most of these people are not legitimate telemarketers. They are scam artists with spoofed numbers, so it's much more difficult to track them down and sue them or get them arrested.
They call our business three or four times a week and ask to speak to the owner. The owner is never in, so I ask to leave a message. Always the same reply "No thanks, I'll just call back another time." Good luck with that the owner never takes personal calls.
This number is from some sort of credit card processing company. They are very rude and pushy. All they want is for you to switch your business credit card processing to them. They lie and say they'll give you all these great rates with low monthly fees. Again they lie. Judging by the online feedback from this company they lure you in with cheap rates, make you sign a 2 year contract, then charge you ungodly amounts for each credit card transaction made in your business and your stuck with them for 2 years. Telling them not to call your business or to remove you from their calling list does not work. They harass me daily. I'm to the point that when their number appears on the caller ID or any 214 number with Merchant SVC as the caller, I don't answer. DO NOT FALL FOR ANYTHING THESE PEOPLE TELL YOU THEY LIE AND HAVE VERY POOR BUSINESS ETHICS!