They call and hang up. When call back it is busy.How do I get them to stop?

I receive several calls from this number. I told them many times to stop, I treatened to call the FCC, Consumer Scam Division etc to no avail. I blocked the number from my cell, but a few minutes ago I just got another one.......somebody please tell me the secret to stop the scammers......

I have been receiving calls from this number and they do not leave a message.  I am registered on the DO NOT CALL LIST and pay to have all my numbers unlisted.  I don't know how they got this number as I never give it out.  I have put a greeting on my phone stating that I am on the do not call list, take me off your list, do not call me again, I do not need anything, did not order anything and do not want to take advantage of a great money making opportunity.  I also said that this call will be reported and is being recorded and an incident report will be filed to the fraud division should the calls persist.

I have been inundated w/ telemarketing calls recently that I did not initiate. I am on National Do Not Call list & use a Magicack for my home #.So it's NOT a published number, & I have filed so many complaints, but they keep changing the calling numbers.
The other day a woman asked for a 'Tony' & when I said there was no one Here she started pitching ME without missing a beat. I then hung up.& She called right back. Even IF original caller requested info I made it vlear I had NO interest...

I've been getting phone calls from 623-476-1914, 480-642-1671, and numerous other (mr number) calls