Constant calls, always press 3 when prompted for NO MORE CALLS! However they continue from different

Always press 3 on their prompts which is to NOT to receive any further calls from them. You can never talk to anyone, if you wait and get a person they immediately hang up as soon as you ask them about discontinuing any further calls. We are registered on the National Do Not Call Registration which makes this an even more annoying call.  I do not want to get any calls from any credit card service companies!