Giving me a bad credit record on closed account

Greetings<br> <br> My contract expired in February 2015. I requested that my contract be cancelled when it ends. Now in June 2015, they say I skipped a payment of R43 in May 2015. when I call customer service line, they say there was an outstanding amount of R78 in February 2015. <br> <br> Why is it only showing now, 3 months later?<br> How do I have outstanding amount if I was paying by debit order?<br> Why are the amounts different from credit record?<br> Why did Autopage call me to let me know I have outstanding amount?<br> <br> I have been Autoapge customer since July 2012 and never skipped a payment.<br> <br> I request this skipped payment to be removed from my credit records.