Seems it impossible to close Discovery Credit Card

I have been trying to close my Discovery Platinum Credit Card since 18th Jan 2016. <br> <br> So I requested a settlement figure, paid it and submitted all necessary forms 18th Jan'16. Your reference number is: ***.<br> <br> So next ting I got a notification, 2 days later (20th Jan'16) that, after having paid the settlement figure, I still owe R83.70, which till today nobody at Discovery card could explain what for. regardless, I paid it and again instructed them to close my account with immediate effect. Your reference number is: ***. As each time you get a new reference number...<br> <br> So 22 Jan'16 I received an email from Discovery \We've received your request to close your DiscoveryPlatinum Card account and would like to confirm your account was closed on 22 January 2016.\" I rep**** to this, Reference number is: *** (3rd one...) and again Ref *** (4th ref no now).<br> <br> So I was quite surprised when I received a card statement 11th March'16, showing that I \"owe\" R3.31 (with no description) and now I am charged another R75 for card fees for the lat month...<br> <br> It seems that it might be impossible to close this card and that again Discovery has no idea what is happening.<br> <br> <br> <br> <br> <br> "