Got 2 calls from this number. No one answers when I pick up

A lady phoned me, saying she is taking a "survey". I told her that I charge $200 per survey. At that point, call ended

Have gotten calls 3 times in the last week by them. First time I answered and it took a while for someone to respond and when she asked how she was and told me her name and ubruptly she hung up. Haven't answered since.

Received a call twice today.  No response when pickup.

These people have been calling me at least twice a day since the last two months or so... the last two calls I actually answered and when they ask to do a survey I politely tell them no thank you then I hear silence on the other end and I end up hanging up ...then they call back the next day!! I'm getting frustrated as I've asked them not to call back and they keep calling back the very next day...next step is blocking the number or charging them with harassment!