Marks and Spencer bank charged me alot of interest this month because, although I have a DD set up for the minimum amount and paid the remaining balance literally 3 days after the due date, they've charged interest from the purchase date, rather than the end of the month.
E.g. I if I bought something on 1 September and paid it off on 10th October there is no interest. If I pay it on 14th October instead I am charge interest from 1 September.
Is this normal or a peculiarity of M&S? I could understand if I was late in making the minimum payment, but it goes out by DD.
If this isn't normal I'd really like suggestions of a better provider please!