The recent 50p rise, partly explained by the ~30p a month rise in the wholesale costs of full LLU from Openreach. Was talking on BBC Radio about this for both customers of BT Retail and TalkTalk last week.
The mess that was Tiscali and its various previous purchases will be difficult to resolve, seem to recall saying something about this when it all happened. It was no uncommon for their to people on retention deals, that TalkTalk may be wanting to get rid of now.
The issues of TalkTalk levels of phone support are ongoing, and its not just this ISP, we see many ISP's with problems. It is unclear if the ratio with TalkTalk is worse, but the impression one gets is that length of time to resolve can be worse with TalkTalk.
There is the direct email@example.com
people can now try, but I would suggest the TalkTalk Members forum if people have not already tried it. Alternatively we can usually prod the right people (as we can with many providers).
TalkTalk is still clearly a budget provider, the line rental and broadband for £20 is still one of the cheapest deals. Particularly if bought during an offer period.