Deduct installment after settlement was done

I am rather dissappointed in JDFS Banking. Acc nr *** refers.<br> <br> The settlement amount of R3 984.262 was obtained from JDFS Banking and on 7 March 2016, the full amount was paid electronically and proof of payment was emailed to [Email Removed] the same day.<br> I also received the following email from JDFS Banking:<br> \Good day,<br> <br> Proof of payment has been received, payment will be processed as soon as it reflects in our bank statement.<br> <br> @ Your Service JDFS Banking<br> <br> Warm Regards,<br> JDFS Banking: Customer Administration<br> JDG Trading Pty Ltd<br> Tel: *** | Fax2email: ***<br> email: [Email Removed]<br> <br> This morning, the amount of R740 (installment amount), was deducted from my son's account! My son phoned them and they confirm that they receid the settled amount but yet the money is paid back to him.<br> <br> Find attached proof of payment (settlement).<br> <br> Regards "