Credit Card not closed within proposed time frame

Went to Irene Mall branch, requested CC be closed 20/1 account fully paid up, req Credit transferred to Cheque acc. Call was made to relevant department, were told it would be done in 3-6 days. 4 weeks later received Stat for CC in post, acc still open, additional charges had gone off, acc now in Debit. Went to Krugersdorp, Keywest branch 24/2 ,Mpho directly emailed relevant department req immediate closure (Initial req could be seen on the system) Waited another 7 days for a response, Mpho said I could collect letter stating acc had been closed. Was only able to collect letter that Friday, asked Mpho to email it-he promised but never did. Went in personally to collect but he wasn't at work. Went to Irene Mall branch 7/03 to collect letter-SYSTEM SHOWS ACC STILL NOT CLOSED. Was told to contact Blue Bean, because Standard Bank doesn't close CC. Why was this not mentioned straight from the beginning?! Why is the acc still not closed after 46 days of req it?! Why did Mpho lie about the acc being closed when it wasn't?! Why is Standard bank refusing to fulfil a need their client has asked for NUMEROUS times?! WORST banking experience ever!!!