Despite 4 refusals on my part, they continue to ca...

Despite 4 refusals on my part, they continue to call me to harass me and sell me their ***** insurance
"Please excuse me but I am not interested"
"But let me introduce you to our products"
"I just said that I was not interested"
They call me 4 to 5 times a day, even on Sundays.
How to file a harassment complaint?
Scam scam scam