Settled Account

I had a balance of R13226.29 on my loan, On 29 March 2015 I called RCS to settle the loan. I was given a settlement amount of R10336.00. On 30 March 2015 I paid that amount but was told that my monthly debit order will still go through so I should call again to have that debit reversed. On the 2nd of April my account was debited and I called RCS to have that reversed but was told that the debit was inclusive with the settlement amount . After a lot of back and forth I accepted that. Around the 6th of April that debit was reversed back into my account, they never told me why. On 2 May 2015 my account was debited when I called RCS they told me the debit never went through the month before. I confirmed that account had been settled and I asked for Settlement certificate and was told it would be posted. On 2June 2015 my account was debited again, when I called RCS they told me that they need a bank statement to confirm and they would reverse the debit. I sent them the statement on the 5June 2015and an email but got no reply as yet. I have other debits on the same bank account and because of RCS I have INSUFFICIENT FUNDS for those debits and run the risk LEGAL ACTION taken against me.