Waiting for Refund !!!

Was on Debt review until end Feb 2015. Incredible connection card account was sold to Capital Data and was over paid because they don't communicate between JD Group \initial account holder"and Capital Data (MBD)<br> Been waiting for Capital data to pay a Refund for the over paid account since end Feb 2015 and was only told that refund will be paid on 8 May 2015.... Surprise Surprise No payment been done into my account with no proof of payment as I requested. <br> <br> Why cant I start charging interest for late payments ???<br> <br> Very Unhappy <br> Johan<br> <br> """