Wonga dishonesty and mismanagement

In December I got a pay day loan from wonga, when they Debited my account there was no money. The following day I got a call from Blake & Associate on behalf of wonga. They gave me a reference number via sms and told me to deposit into wonga’s account. I deposited the funds from an ABSA atm. The atm did not allow some of the notes that I had so I made 2 deposits of R 5350 and R170. I did not hear from them until January when they debited my account again. I reversed the payment and told them I have paid. I was able to send proof of payment for R5350 but I could not find the slip for the R170.I was told that I used a wrong reference number and that I should have used my ID. I told them that this was the reference number provided to me and that it is the same reference number I used so that they can check for the R170 I deposited separately. When I called at first the person assisting me said she was able to see the payment however in March I was told that they cannot see the payment and should send them an email of the proof of payment as they were now aware that I said I lost the POP. As I have lost the proof of payment Wonga is dishonest about tracing my funds of R170. My credit record has been negatively affected as a result of this and my Wonga account has accumulated interest of R300. The bank cannot help me trace the payment as I did an atm deposit. I would not recommend Wonga to anyone as they use multiple agencies to collect money and they don’t communicate with them and since I use the reference that Blake gave me, they say they cannot trace the payment.