Down two days! Help!

[toocrazy2yoo]

Brandon! Someone! My service is down two days. I waited, thinking it would come back! It didn't. I get dial tone, the digits go out, but the call goes to fast busy/reorder tone after maybe ten seconds. Calls to "1-2-3" voice mail get the same result. When i call in, it gives the far end 7-9 rings, then gives THEM a fast busy. At this end, I hear no rings. My router is a Grandstream HT502. The service I'm currently connected to is Verizon FIOS. It's been fine for over a year and works on Comcast, too. Or has, until yesterday. Any suggestions or bulletins about the service in general?

Thanks!