I get a ton of these ad calls a week. I ask to get off of their list but I still get more and more. All to my cell phone. I thought they couldn't call cell phones.
I get two or three of these types of calls EVERY DAY on my cell phone! (It's the only phone I have.) The rare occasion one of them leaves a message it's telling me that I have to call now to lower my interest rate and if I don't call soon my interest rate will go up. I don't have a credit card, loans, back due bills, or anything that would involve an interest rate that could be lowered. Sometimes they call two or three times within ten minutes. This is getting a little ridiculous.
Don't press the number to get taken off the list. It lets them know your number is active and that you do answer. You will start getting calls from other numbers after this.
The best thing to do is to report their number to the FTC, especially if you have already put yourself on the Do Not Call registry.
I've got a call from 339-502-6670 3 times so far and just ignored it. I just got a call moments ago from 339-502-6670. I can't imagine how any thing can be sold using this technic. Maybe they just do it for the joy of annoying people.