Harassment, Irritation, endless spamming!!!!

What a ****** irritation!! I have asked them numerous times, very politely, over the past year, to remove our company's phone number from their database, but they persisted in contacting us. February 2024 I received a call from David, I literally told him to f*ck off, still they phoned. Last week I received a call again, again I asked "please please please please remove our number from your system, we are not interested in your products/ services". Today, I got another call. It seems like harassment is their tactic, they must think that eventually we will give in and sign up for their services. I am on the verge of driving to their offices and slapping someone!! Maybe that will wake them up!!