Awaiting refunds for a double booking

On 2/10/2015 I've made an online booking, my computer crashed while making the payment, I've contacted Mango's call centre they could not find a booking, so I made another booking, payed with my creditcard. When I got to the airport on 7/10/2015 I was told there was a double booking, and I was given a contact number at the info counter to contact for my refunds. the ref. nr. were MYNNLN & MYNMMS. According to the man at the counter I must get refunded on ref: MYNMMS On 14/10/2015 I've send my first email and got response from Patricia Malatji, she requested information which I've send. today is 11/11/2015 and even after follow up emails I get no response.