Claimed to be from Star Duct Cleaning

Duct cleaning company with India accent.  Call constantly wanting to know if we want our ducts cleaned.  We have said we may in the Spring and they call daily.  We have asked them to stop calling and they still call us.  I have put their numbers on the do not call list, had them blocked from my phone for a bit (costs too much).

My husband got sucked into possibly scheduling an appointment and they just showed up, no call before had or even an appointment. They are creeps.