That's lousy.
Well, I'd cancel anyway. The cancellation fee is probably less than two months of the new payment, so even if you can't fight them you will still get a better deal cancelling now and moving on than sticking with them.
But I think you can fight it. Demand the paperwork, original bill, or phone record of your agreement and point out the flaws. If you're using a credit card to pay for it, call the credit card company, tell them the problem, and indicate that you want to issue a chargeback. See if they have buyer protection against unscrupulous sellers.
It's certainly an amount worth fighting over.
Well, I'd cancel anyway. The cancellation fee is probably less than two months of the new payment, so even if you can't fight them you will still get a better deal cancelling now and moving on than sticking with them.
But I think you can fight it. Demand the paperwork, original bill, or phone record of your agreement and point out the flaws. If you're using a credit card to pay for it, call the credit card company, tell them the problem, and indicate that you want to issue a chargeback. See if they have buyer protection against unscrupulous sellers.
It's certainly an amount worth fighting over.