Pathetic customer service

I currently have a cheque account for my small business with FNB. My card has expired 14 days ago and I still have not received my card. The courier company sends me messages frequently promising delivery but each time the date of delivery is changed. This has been going on since the last week of October! If I am not wanted as a client then FNB should close my account and I can open the account with a different bank! My account has gone in excess as I have requested my customers to pay me cash. Reason for not allowing money in my account is due to me being in need of using my money to pay my doctors fees. Yesterday a client accidentally paid money into my account and the excess charges where deducted. FNB is liable to reimburse me as I have been more than patient with them. Since the 25th of October I have been trying to get hold of the courier company but no one seems to answer the phone! This pathetic service by FNB has made me incur the unnecessary expenses. I DEMAND for SOMEONE in CHARGE to contact me. I have even lodged a complaint using the FNB website but I have been IGNORED as usual. I am really ****ed off and will take this matter further!!!