Shitty contract vs Act of Parliament...
These practices are illegal in the UK and have been for some time.
Any provider would epically fail in court due to the Consumer Protection from Unfair Trading Regulations Act 2008.
The beauty for customers taking this route is that you get to claim compensation as well a refund. You can also charge interest at up to an APR of 8%
Essentially they tried to **ck people over, but people can easily **ck em' back several times over. It's cheap, pretty quick and easy to do.