You got lucky then :P.
Good luck with them. Voda have lost me for good at this point. I joined their broadband through gritted teeth having been let down massively by them years ago when they sold me a mobile phone that turned out to be a lemon and they then jerked me around with some seriously...
Which speed you on? If you're on the The 63Mbps Superfest 2 uses a different router which I'm told works fine. The router I had for the 35Mbps Superfast 1 was utter tosh. And I know the problem was the wifi from the router, because I was able to resolve it by connecting (via ethernet) an old BT...
Got any Apple devices connecting to the wifi? I had no end of problems with the router dropping the wifi signal and needing resets. I've heard since I left that the particular router they supplied me might have a major bug if an iOS device is on the network.