Bridge Of Contract

I took out a loan with the African Bank 3 months ago. Everything was going well until my bank account was debited twice with the amount of R672. I made contact with my bank and reversed one amount. I then kept on receiving sms's from the African bank that I did not pay them and this will result in me having to deal with their lawyers. I called teh African Bank and spoke to one of their consultants, who advised me to avoid those sms's as it shows that on his system my acc was indeed debited twice. On the month of Dec, they did not debited my account, today (04/01/2016) I called them again on *** and spoke to a lady who since put me on hold for 30minutes (on record) and then she hung up. You guys have the most pathetic service. Should my account not be debited by the end of Tuesday (05/01/2016), do not bother yourselves and should I be in errears due to your stupid deeds, GOD HELP ME. Please sort this matter out before I do...