The same company has been harassing for the better part a year now wanting to buy a property I don’t own. I have filled a DO NOT CALL registration, I have blocked their numbers multiple times, I have told them to stop calling and to remove my name from their list, and now I’m getting maybe 1 or 2 calls a day and multiple texts.
Assuming USA, sue them. They owe you $500 per call after your number has been on the do-not-call registry for 31 days or after you told them not to call you again. If the violation was willful, they owe $1500 per call.
https://en.wikipedia.org/wiki/Telephone_Consumer_Protection_Act_of_1991