You should try these several methods if your payment does not go through. 

1. Please try again and make sure that you fill out the blank fields with valid details.
2. Try paying with your other card or another payment method. We have e.g. Google Pay.
3. Contact your bank to find out the reason why the transaction gets blocked.

Just a reminder❗

The annual premium subscription is the perfect option for students who aim for a First Class. The annual subscription is the best value deal that we can offer. Not only do you save 25% of your money for the premium study materials, but you also get one hour of personalised one-to-one tutoring for free (worth £45). Value of £225 for just £135!💸