they called my Cell phone trying to sell heathcare services. not sure how they got my number but me not interested

I'm employed with great health care benefits from my employer.I keep getting calls from this number to my work number offering "great health care".

They called me but did not leave a message and when I called the number, I got a recording saying the "customer" I was calling was not available. Weird

Called while I was handling a case at work...called back and got the same "the customer you have called is not available.  please try your call later." message.

got a text
"From:0001114444
From:(416) 523-1121
do you know wher your
gf was monday nite? its
not where she said she
was!!!!!!!"

i called and it said "call could not be completed as dialed" then called later and it said "welcome to verizon wireless the number you called has been diconected or is no longer in service" Tring it now and it says "your call cannot be completed as dialed please check the number and dial agian 2-fi-y" i think thats what the end said

They have been calling me asking about extending my car warranty.  I have simply asked "which car are they calling about"  they never have the right answer.  best suggestion, when they call explain that you are about kill yourself and they will be the last person that you ever speak to.  Place the phone down and walk awya for a few moments