Re: Same here
I suspect they are trying it on with the letters and the "recommended" new plan, give them a call and you'll probably find they've got something closer to what you use. All you can eat data is no more I think though.
Agree that the advertising is a joke, but I had a look round and only Giffgaff has a plan anywhere close in price to mine. Didn't check BT though, for obvious reasons.