Account 'overline', yet monies owed has been paid up

Good day,

I received my salary over the weekend and transferred R800.00, as well as the minimum amount payable from my Cheque account to my Credit Card, as well as an additional R1,000.00 afterwards. Now, when trying to transfer some money back to my Cheque account, it states that the transaction is unsuccessful since the Crecit account is 'overline'. I do realize that my Credit account is in arrears by a bit, but that is why I immediately transferred over the minimum amount owed. When will I be able to transfer money back to my Cheque account? This is ridiculous and urgent. Surely ABSA cannot retain this amount now reflecting in my Credit account, if it is much more than that which I owe? Please advise asap.