Refunding of faulty credit

in Feb 2015 guests booked at my establishment via Safarinow. I gave them 10%discount for early booking and they settled the full amount (R4500.00). Safarinouw paid me my portion of the fee. According to the agreement with the agency once a booking has been finalised any other fees eg key and breakage deposit should be directly negotiated with the guest. A month or 2 later the guest phoned me directly and asked me if I could accommodate an extra guest. I send her an account of R1000.00 (500 for the guest and 500 for key deposit) On 1 July she accidently paid this into Safari's account. Since 6 July I was trying to explain this to Safari and have the R1000,00 paid back to me. Yesterday they said they would refund me, but I have received 2 statements which indicate that they calculate the R1000.00 as part of their initial booking and this morning R512 was paid into my account which will barely cover the key deposit which has to be paid back to the guest. This means that Safarinow takes commission on my extra guest which was part of a private transaction as well as on my key and breakage deposit. Ac member of agency I comply with agreement, which is clearly not the case with SN