I ignore them. In the past, whenever I've politely responded no, it seemed to be a signal for them to keep trying to talk to me, or to try again in three month

I ignore them. In the past, whenever I've politely responded no, it seemed to be a signal for them to keep trying to talk to me, or to try again in three months, when the whole point was to get them to stop talking to me. Worst, though, is when they somehow get ahold of your phone number (or, in a recent case, call, then text about how they've just called). This is just straight up creepy as I don't lightly give my phone number out. In these cases I do take the time to ask them to please stop.