Account department and it's failure to perform their duties right.

On the 26th I paid off my account and the request was for the account to be closed , the lady who was assisting me made me fill out a form which required me to state the reasons for me wanting to close off the account and damages the card. I was assured that the account is now closed . 15 day's into the lock down I receive a statement informing me that I'm owing MrP money R15. Which when I calculate is the money for their card protection insurance and the other one , which I've requested to be taken out and I received an sms that the insurance was cancelled. Even after I've paid the entire balance they refuse to close the account they are giving me a run around. I've sent e-mails and no response, I've been communicating with them via Twitter and gave them all the details and I was assured that they have now closed the account which is more lies.....