payment

My mr price account is always up to date. We made a payment on the 6 march and so the end of last month we realise there is a overdue amount on my account and interest charged because of the overdue amount. So the system nevered pick up the payment that we made the 6. I mailed the proof of paymnt slip to the accounts. They fixed it but still my accouny says overdue and the still charge me interest because of overdue. <br> <br> I phoned one day and i spoke to a lady and se said nothing is wrond with acoount. But on my new statement it says OVERDUE<br> <br> Im really disappointed in this because my account is not overdue BUT i have to lay interest because of overdue amount<br> I personally thinks that all the interest of the last 2 months must be reversed and the statement must be fixed