Did you tell them your phone number even though you purposefully blocked it out? Otherwise, they wouldn't have know who called them

I do not want companies nor people calling my cell phone unless I give them my number

Yeah, in Texas, something about help from the Federal Government. Probably tea-baggers. Then if you call back, a message says there is no such number. I give out my cell number to no one, so where did they get it?

I don't know how these idiots got my prepaid cell phone number, but they keep calling and calling.  When I call back, it rings a few times then goes to a fast busy as if it is out of service.  I think they should be targeted as terrorists, because it is terrorizing me, and I am sure others as well.

They called my cell with some garbled recording about "an important message for Florida homeowners".

This is a debt collector.  They called on my cell phone, which I did not answer, and then I blocked out caller ID on my landline and called them back.

They were looking for someone else and I told them they were not at my number and to remove my number from their records immediately.  We'll see if this works.