Sure Signal (1st Gen) stopped working - how do I order a replacement?

[Twinsplustwo]

I have an original Sure Signal that I paid for years ago. This was the only way we could obtain ANY phone network here so have been with Vodafonr ever since. However, despite following all the troubleshooting guides (and my husband is very tech savvy) it is stuck in an endless re-start cycle. How do I get it replaced please?

[jemg]

UPDATE:

I have brought one of the sure signals to work this moring and plugged it in - works first time. This tells me there is a problem with either the port forwarding on the router at home or my broadband both of which don't stack up. The home router I reset to factory settings last evening so that should not be an issue. Everything else with my broadband is fine. Can somebody from the tech team please look into this for me as I have no mobile signal at home at all without the sure signal.

Thanks in advance for your help.