$30 includes unlimited texting? Quite a bargain I'd say.

'we are unable to meet your current wireless needs..." = You've been buggin' us too much. We're not making any money off your account, so good-bye. By your own admission you call them 'alot' (a lot). Since you first signed on, it was 'every month' to correct their errors. Are you sure you didn't get notification that there was a change in your plan? Check your old bills--it's probably in there. But to placate you, they knocked off $8.00 each time you called.

You've called them 'pretty much every day for the past month.'

I have my own small business and have on occasion had to dismiss a client for just these reasons. Once a complete 175 page report was 'misplaced.' OK--just this one time. A couple of weeks later, the backup material couldn't be located. Good thing I archive my research, which my contract states I don't have to. Alright, here it is. After more than one time of these various requests, I found I wasn't making any money on the project, so terminated our relationship.

At $30/mo. I can understand why they don't care to continue to do business with you. They've given you lots of lead time to find another provider. Let's see what kind of good deals you can get out of the next one.