refund

I have paid R3 300.00 into my tracker account instead of R300.00, I have requested a refund of R3000.00 and am being told that I will only get a refund of the advanced amount. There's an arrangement in place for me to pay R100.00 until such time the account is paid in full but I am being told stories. All I want is my money because I did not make a provision for such.