The Co-op will punish credit card customers who legitimately reject an interest rate rise by demanding they repay costly debts in just six months. Otherwise, they must accept the initial hike.
A major credit card shake-up will be complete this month with all providers set to stop penalising those who spend on their plastic after making a balance transfer.
Santander has once again been ranked the worst bank for service by an overwhelming margin, according to a poll of over 9,000 MoneySavingExpert.com users.