the only way to end them is to never buy from them.  I am tired of telling them not to call me again, that I will never buy from them and to take me off their list....they don't give a [***] about how much time they are wasting for themselves.   Sometimes I answer and just set the phone down,  or keep them on for a long while and then say if you call me again you are going to get the same....a big waste of your time.   Then I block their number, only to be called by another that was traded my information.