Please assist in closing my nedbank credit facility

I paid my credit card on the 29th of last month a few days late of normally paying it but still in the month that it was due today I checked my credit report and it show that I was 30 days over due, I then called nedbank and the consultant advised that she sees the payment but it takes some time to up date and they send a request to the bureau to have it removed and have to wait for them. But now my concern is being a client of nedbank for the past 7 years and also having the credit card facility for the same amout of time, why did Nedbank never inform me that I need to pay the amount due by the 19th of every month initially when taking out the credit facility I got paid on the 27th and even my loans and debit orders for such accounts reflect that, when I had a debit or for the credit card. And what happened to the fact that over all the month that I paid my credit card I normally paid R2000 above the amount that needs to be paid and which I paid R2000 in November and December and then in January I paid R2450 which I received a message notifying me my account was overdue and needed to be paid, to which I paid for January and February now why the hell are you listing me I paid fir for 2 months. With all that being said the consultant advised me that I now paid for December R2450 which would be pro rata the message I received said for January, but let's just say I did pay for the month before this means that I then paid for December and January but I can guarantee nedbank will send another message and list me again for not paying in February and say the amount I paid in January was only for December and not for 2 months. At this point I am completely and utterly enraged if it's not my current account I'm having issues with its with my vehicle finance if it's not MFC then it's my credit card, really when will nedbank stop this **** and treat me like a valued client. Please give me correct information to close the account because I've had enough I'm moving bank accounts and can't deal with additional problems cause by others incompetence and failure to communicate correctly.