Head to the TSB website contact page and get in touch. Someone should get back to you within two working days.
*edit - turns out the providers are all upgrading and the glimp site is more up to date* Both the highlighted deals i clicked through to get turned out to be inaccurate speeds. Glimp saying 300/100 both providers only offering 100/20 for the price given, despite giving the same address in both sites. still giving 3 stars though as regardless the deals through Glimp are better than the standard advertised deals on the providers site.
Sign up didn't go quite the way it was meant to. But Kate called and she walked through everything so we could work out what went wrong. she was patient, friendly, supportive and kept me calm to finally get plan registration sorted ( still can't log in though - she must be magic )