Travelstart passing the buck to CEMAIR

I have tried emailing them as per the request below, maybe this will garner some sort of reaction.

CEMAIR flight was grounded in December. Travelstart promised a refund 6 - 8 weeks after the fact. Now, we get this load of drivel:

We regret to inform you that there has been a delay in the processing of refunds for Cemair due to the airline no longer being part of the airline/agency remittance system. Cemair has, however, advised that they will process refunds outside of this remittance system directly to clients' bank accounts. In order to do so they request a letter from each clients' bank stating the bank details of the person who paid for the tickets. In light of this, if you are still awaiting a refund, for your Cemair tickets, please could you respond to ********** with your Travelstart reference number for the Cemair flights and a letter from your bank stating your bank account details so we can assit you. If you have already received your refund please ignore this email. On behalf of the airline we apologise for the inconvenience and thank you for your patience. Kind Regards Travelstart

Travelstart, I live in the Kruger Park - there is no bank from which I can get a letter. Why on earth you think it should be my responsibility to go and get a letter from the bank is beyond me. I paid YOU, YOU are the vendor. If your vendor did not uphold their end of the their contract with you, it is not my problem. I paid you and I expect you to refund me without my having to go through the exceptionally tedious process of going to a bank.

Please pay me back my money!