TIVO HDs Will No Longer Connect to the Service

I have 3 TIVO Series 3 HDs that connect via a phone line. I also had a TIVO Premiere that stopped working. I had a TIVO HD on hand and I hooked it up to replace the Premiere and got it activated. It downloaded the first day's guide, and I set it up and recorded two shows. When I checked it out a few days later it would no longer connect to the service and there was no guide info. I called Tech Support and they said it had an invalid phone number. The Tech also said that my other 3 units had not connected to the service in 3 days and was going to lose all data. With Tech support we tried for several hours to get them to work, and they would no longer connect to the service. I made sure all 3 units had the correct number, but they will still not to connect to the service. My accounta status was in good standing. Has TIVO decided to no longer support using a phone line to connect to the service? I live in an area that does not have cable and it is next to impossible to get suitable internet. Does any one have any suggestions? I now get the message that my TIVOs will run out of guide data on Monday, the 24th. Thanks for any help.