Since you asked nicely, I'm sure they would stop calling, if they knew your number!

Just got 5 calls in 15 minutes.

i am getting calls from this number on my mobile phone every 5-10 minutes. They have called 9 times so far. I've picked up twice, said hello, and no one is there. Then, an automated voice says "good bye".
they don't leave a message either. Very annoying.

 This number use to call me 20+ times a day, but now I've managed to only get a call once every other week.  What I did was 1st. turn my phone off when I was getting a barage of calls, and once the constant calling stopped I would silence the call if it happened again, whatever you do, DO NOT try calling the number back or answer the call it will just unleash more calls to you.

I have received 10 calls this morning - answer and it hangs up.  Then I tried to call back, rings several times and then hangs up.  I do not know who these people are, but do not want them calling my phone.