******* HAND OVER

I paid my Account with Woolwoths IN FULL October 2017 after they gave me the amount due. In March I received a call from the Credit Department to say that I own R 140 - I went in-store to confirm the amount due upon which they told me it is R 159.99 but i cannot pay it in store as it has been handed over to the credit department. I phoned and they confirmed that they are unsure what the amount is for - then i sent a email to the email address given by the representative to inquire about the monies. Still heard nothing - Today I receive a message on my WORK Phone - " Warrning WOOLWORTHS may notify all the credit bureaus of the non- payment of your account. Pay R 50 today. Contact ********** and quote ref nr. ....." Which I did - Then after spending another 20 minutes on the phone with them they finnaly tell me it was an underpayment of R 40 in October - I did not receive any sms, statement of call to say that i own any monies and i was under the impression that my account was paid in FULL !!!!! This is no Intrest on the R 40!!!! And Yet they have no apologized for not letting me know of the outstanding amount before handing it to the Credit Department. THIS IS THE WORST SERVICE EVER