My only issues are with Verizon. They call me at least five times per week trying to upsell me on internet packages. And they are my current phone and net provider, so Do Not Call list has no effect on them. (and since my alternative is Comcast, I’m damn well not switching)
I had the same problem with my internet provider. After I told them I would cancel my account the next time they called me with another “exciting offer” they stopped calling. I’ve used this method successfully with several other companies I do business with. They don’t want to lose your business.