My plan of action is the same. I have not been notified so I will wait to be called. When they ask me to pay more - i will refuse - mentioning what you just did.

Given no choice I will ask for the following:

- Increase my allowance to 1GB. or
- Cancel my contract

I wonder which one they will go for. If they try to charge a termination fee I will cancel my direct debit, and raise a complaint with the FCC.