Erm no PPI interest is at 8% . However As described the balance of your card in unaffected by the refund. You do not have PPI interest removed at all. It does not put you back as you still have a higher balance then if no PPI in my case £1100 higher, read again, it is your choice on refund how you pay £1500 off, use the £1100 refund but in real terms your original £500 would of done that but now they want £1100 to pay it again. It is your debt and no 8% rate on a credit card it is a clever sting operation.