The APR differs, depending on how you pay your bill: Minimum payment is �5. Our typical APR is 39.9% (variable) if you pay by any method other than direct debit, and our APR is 29.3% (variable) where you pay by direct debit.
If you don't pay be DD then you are paying 39.9% interest, which is massive and is why so much of your payment is going on 'charges'.
You should have read the terms and conditions before buying stuff and taking out a credit account. Did you think they would lend you the money for nothing?