This bank is nonsense

I get paid on the 25 I do my shopping I swipe nd withdraw. My account has a balance then all of a sudden I'm told I have R84 what the hell is gng on with this bank.whats the use of having Internet banking if it reflects the wrong information. In the beginning I was charged R21 which I don't know and every branch says there not sure what the charge is for than I was given an incorrect card. Moving from FNB to Nedbank was a huge mistake there accounts is up to *******. I will close this account as soon as my debit orders run. This is ******* why does it take 7days for a swipe to reflect on statement.