What happens next?

How to ask telemarketers to stop calling
Don't hang up straight-away.
Often you will be able to tell very quickly if the person calling is a telemarketer, and the temptation will be to just hang up immediately. If you want to get him to stop calling you, however, it's important that you answer the call and talk to the caller.
Calls that are unanswered are generally rescheduled to be repeated later on. Hanging up without saying anything is sometimes misinterpreted as a child or unaware family member answering.