I use TalkTalk Broadband, partly because I used to work for Carphone Warehouse. The TalkTalk service is cheap but when you’re paying peanuts you do get monkeys. The most common problem I have with the broadband is that it suddenly gives up the ghost or that it runs slow and then stops seeing certain domains.
The answer to these solutions is simple and slightly embarassing in the light of the IT Crowd‘s catchphrase. Simply turn your router off and then back on again. If TalkTalk just put this simple instruction on the front of their support pages I would have only had to contact them once in the last six months.
Of course if that doesn’t work you’re going to have to find something else to do for half an hour while the TalkTalk engineers try and bring the system back up.