CREDIT CARD FAILURE

I tried using my credit card and this was declined as daily limit was exceeded, this being the first time using it and the amount being over R 5000 less than my limit. left with a red face infront of other customers and went to the nearest African Bank, they checked and said all is fine, enough daily limit, enough money in the account they dont know what is wrong, changed the pin on my card and logged a query for which i received a reference number and contact number. This contact number does not work after numerous attempts. Then received a SMS the query had been resolved and all in order. Again wen tot the shop for groceries and guess what, now the PIN nr are wrong, even tried the old and the new. Now still left with no food to buy. The app does not even allow me entry so that i can at least transfer money from my credit account to my other debit card so that i can buy food and electricity. This is beyond pathetic and disgrace, what am i suppose to do the remainder of the weekend with no cash flow. This is disgusting to say the least.