Credit card account closure department.

Have been trying to close my credit card account now for just over 2 weeks. Initially went into the bank and used the phone inside the bank to speak to the credit card division, was told someone will contact me in 24 to 48 hours, still waiting for that call. Few days after no calls I spoke to a Premier banker who said she will escalate the process to the credit card department, still no calls from them. This weekend went into the bank again and spoke to a consultant on the phone, same story, will escalate the issue, seems that no one wants to do their job properly anymore. Please someone from FNB who will close this account immediately contact me please urgently.