Charging me for something i didnt agree too

I had a medical aid with Discovery and in the month of Dec I moved bank and my banking details was not updated .my medical aid was cancelled .I had to pay 12 K .I have been talking to the above mention agent trying to help me for the month of Feb on the 24 he transferred me to account to make an arrange on the outstanding amount .He then later send me forms to complete for new application eff the 1 march which I did .<br> On the 25th he called me saying he has good news underwriting approved. he then said system says from now but it will be changes for the 1 march .today I get double debit of which I don't have the money .<br> <br> I want this sorted out asap