I called back and got a recording that said "The survey You were being called about has already ended. Please press 9 if I wanted to be removed from this call list.". Fingers crossed it works!
It is our experience that doing that w3ill get you many more calls not less. Never, ever push a number to be removed. The criminals are violating the law calling you, why would they honor your wishes. For the record, it can only be a survey, any marketing using a survey as a cover is illegal if you are signed up on the Do Not Call list.