Unless you are going to add useful information, stop replying that they called you. We know. This site does not block them for you.
You need to report them.
donotcall.gov
don't be lazy, report them. Yes it works, no it doesn't work when you have a negative attitude about donotcall.gov working or not working. It works but they only take action on # of complains. So complain there.
This number called my dedicated fax line using the caller ID of "Los Angeles, CA" and the numbers 213 277 5056, 5059 and 5069. I'm sure there are others. Similar calls come from 213 266 7241, 7248, 7261, 7285 and 7351. They all offer a free cruise for competing a survey. They just need you credit card to process the prize - LOL. I have all 213 277 XXXX and 213 266 XXXX numbers blocked. This works quite well.