Paid my Amount in Arrears and Yet not Allocated

I had a lone with Getbucks but missed payment. i then called them and said i would settle said debt which i promptly did on 03/02/2015. I have sent Proof of payment to their collections department twice, a consultant from the collections department Kgotso twice and now to their general customer care email. I would like to have this matter resolved as soon as possible. Please help as the next step would be to lay a complaint with the NCR