Refusal to refund me because its not their fault.

On 23 Jan I mistakenly did an EFT payment of R 1043. 00 to the insurance. On the same day, the same amount was debited from my account and yes they are sitting with double payments. <br> <br> I called their client services on 1 Feb and requested a refund. I spoke to Nelly, who loaded my request and promised to have someone call me to get the account number to which my refund should be credited. 24 hours later, nobody called and I decided to call them. Zahida, and her manager, Theoline Swart, told me that they unfortunately cannot make a refund to my chosen account, because it is not their fault that I paid them twice. I am not talking faults here, I am talking principle. I want my refund, and no, not to be credited to the account number that you have in your systems. I want it to be paid into a different account. I don't see why that is impossible. I'm humbly requesting for my money.