And when you are on a prepaid cell, getting the runaround and being put on hold costs money.
Back in the old days of land lines and phones on the wall, my mother would hang the receiver on the side of the phone and let the TM talk to air.
When I would get calls from TMs, I would say "Please tell your supervisor I do not like this kind of advertising, and if I need your service, I will find another company to provide it".