money taken with my consent and then told l owe R12100.00

My name is Roedashni , and l have done a cell phone banking transaction of R6000.00 from my credit card to my husbands Ned bank account on Saturday , and my credit limit is R8100.00 ,l was then left R2100.00 now l am being told that l owe on my card R12100.00 and this is money that l don't have l called numerous of times to Nedbank today and no one can give me any answers on my R2100.00 l also transferred a amount of R6000.00 from my investment back into my card l need this sorted out or l will take this further l have being holding for 21 minutes first call l made and then again 23 minutes and then the last call l made held for 8 minutes and no one comes back to me the call just cuts this is unacceptable and l am heavily pregnant and can not deal; with this stress where l am being told that l owe so much of money l need this sorted out immediately