Unable to get proof of a cancellation letter

Good day,<br> <br> After noticing how RCS works regarding their interest and admin fees, i paid off my RCS account of the 21st of September 2015, sent a request to from [Email Removed] from my gmail account, called in on the 22nd of September 2015 to request a letter confirming that my account will be closed was told i will receive it in 48 working hours till today i haven't, <br> <br> called in today spoke to Nuraan she also said the same story 48 hours and not helping with the fact that she put me on hold for a very long time, when i asked for the terms and conditions to be send to me,she said i have to go to the store(whats the use of the call center if they cannot send me the terms and conditions, she referred me to the line manager by the name of Zola not sure if it's the manager because call center agents just ask their colleagues to speak to clients, as i wait for a call form the manager who is in a meeting currently, <br> <br> Can i have the letter confirming that my account is closed and also the terms and conditions,<br> <br> As i have paid them off why cant i get written confirmation, that i do not owe them is this a way so forcing clients to stay with them?