STILL NO FEEDBACK!!

On the 13th of July 2015 we phoned Direct Axis to get a settlement figure. We received the figure and paid the account in full. Payment was made 2 minutes apart. The total of the 2 payments added up to the settlement figure. On the 24th of this month Direct Axis submitted another installment. When i phoned and asked about it i was told that the money was paid on the 14th and not the 13th. I double checked my bank statements and confirmed that the money was in fact paid the 13th. I spoke to the manager on Duty and he told me that i must send the proof of payment (which i did) and he will phone me immediately. I am not sure how long his immediate is but i am still waiting. They informed me that i have to wait 10 working days for a refund!!!!! 10 WORKING DAYS FOR A MISTAKE THEY MADE!!!!! I am NOT willing to wait 2 weeks for a refund as this was not a mistake on my side.