Yep.
****s got me a few times, 30 day notice at the end of 2 year contract and just the start of this month I had to pay £100 bill for a £10pm sim.....180 mins used over the mins package....wasted half hour getting switched from rep to rep when I called customer service, finally got a promise to deduct £30 from the bill.....**** was lying to get me off the phone
So don't waste any time calling them.
Absolute bastards.