Bad service

I am not happy about the service I am getting.

I phoned so many times and I am not getting any help I explained that I used USSD method to make the payment as it shows on the screen that I sent it’s a cellphone banking method I don’t have a PDF document except bank statement that will be send on the 2nd of January. I explained that to Unathi and Yoyo that If it was an EFT It was going to be able to send proof of payment that they want. I end up asking Supervisor and she told me to send an email of proof of payment clearly no one understands me. I am so annoyed at this moment