2015 claim incorrectly paid from 2016 benefits

On 09.12.2015, I submitted a claim dated 02.09.2015 from my Prosthodontist. (Claim ref ***)<br> The claim was only partially PD as the one line on the invoice was actually an invoice from a 3rd party - Discovery requested a copy of this 3rd party invoice in order to be able to process this portion of the claim. R14,647.79<br> Unfortunately, the Drs rooms were closed for Xmas by this time and I was only able to get the invoice from the 3rd party on the 21.01.2016<br> I submitted this, with the original ref no as this was a 2015 claim. (Claim ref ***)<br> R14,203.79 was paid to me on 10.02.2016<br> I know that there was a limited amount left in my 2015 ATB due to the option I was on in 2015 and that only R1921.54 was paid from ATB.<br> I was not expecting to be refunded the full amount as I knew I was close to my ATB limit - I just didn't know how much was left.<br> The balance of the claim was paid from my 2016 MSA, because according to the consultants I spoke to, the date on which the claim is received is used as the claim date - not the date of service. <br> I would like to pay back the amount refunded to me from 2016 MSA so I have benefits for 2016 but I am told this isn't possible. Pls assist