Getting called up to 8 times a day

So apparently a few online casinos are so hard up to give me a gift.  They've resorted to calling me up to 8 times per day.  Most of the times it's about 5 times a day.
They tell me they have a gift for me and to call 770-261-1418.  Which honestly wouldn't bother me so much, yet they've kept persisting for almost 2 months straight.  Leaving voicemails after each call after each time they've attempted to call me.
So finally I did some research to find out one of the numbers go to Rich Casino.  So then I called to find out why I've been getting up to 8 calls a day.  Well we have a free gift for you?  I'm like any catches?
Long story short, after finding out they were affiliated with Rich and Win Ward.  I said no thanks, yet I'm still getting these phone calls.  When isn't no enough?  I get you want me to come play at your properties.  Yet remove me from you calling list and I'm not interested should be enough to stop this phone spam.
Even the Virtual group isn't this persistent.  So today I called and gave them a piece of my mind.  Hopefully this will end the calls, so far it's been an hour since the last call and I haven't had my usual hourly phone call yet.  Even though I'm still thinking it might happen.
Anyone else getting random calls from Washington DC, Texas, Johannesburg, and London about the same number to call back?
Any luck on stopping these people cold in there tracks?

I'm so glad you said something.

I get calls from all over as well regarding this "free gift for you" from casinos.
Yet its to get me to deposit.
After getting the call "I've deposited money into your account so you can play again"
Then when I get on there....  I'm told its not real money and I have to deposit to get the money.
After deciding not to play with them for phone spamming me about free money in my account to play they still call me to say there's money in my account ~ So I just remind them its not real money and to quit calling.  But they still call.

I hear you but I don't have the answer.  Deleting them out of my system is not enough.  Telling them to only use my phone if there is something for free or an incredibly high deposit bonus isn't enough either.

Good luck with yours.  I think mine was Grand Macao

          Hey Cheetahwind,  I was just scanning the new posts and then I read yours and recognized the area code 770.    There is a number with that code that calls me all the time.  I think that's South Africa, not sure.  All I know is sometimes they leave a weird message, other times nothing.  Haven't called in a few days but for several weeks I'd say I've been getting these calls.  Pain in the ass, wish they'd stop for good. 
Also,  I have been getting a lot of Spam, junk mail, whatever you want to call it from Top Game sites also.    They are  by far the most persistent ones.   
      I don't know, maybe they took the hint since I haven't answered the phone,  hope they stop for good.

Well so far the few numbers I have had come up are
+011 442036089388
+011 27105008494
+011 61281034018
1-202-618-9144

Yet after I told them off, so far knock on d I've only had 1 call today.  Just to post a few of the numbers there calling from.  They've called from I'm pretty sure at least 3 to 4 others.  Yet I can't confirm or deny these mainly because I'm too lazy to go thru my call history.

this is reason why i never gave my real phone number, i always writte something wrong numbers!
few years ago i gave my real number and then i got about 3 calls per day..- i changed phone number..thats all.

yes few times was the same-they requested verification call, but i told them that i recently changed my phone number and havent updated info.. they say always the same-no problems give ur new number..