MTN bad service

On 24/1/19 I loaded 1GB data which was to expire on 31/1/19. Then I received my monthly data of 1GB on 27/1/19. On the 28/1/19 I checked my balance before I use the net. I was on the Internet for an hour and when I checked my balance it was now down to 329MG. I called NTN and spoke to Thobile Cele and explained to her. She then said I must wait for 24hours for the system to update. I told her that I just checked the app and it had put both bundles under the wrong headings. I asked her to log a call for me and she said she can’t do that unless she has proof that what I’m saying is the truth. I asked to speak to a team leader, she put me on hold for 34 minutes after telling me that the team leader is busy on a call and will call me back. The service is appalling and I can’t wait for this contract to come to an end. I’m hoping someone will escalate this matter and assist urgently.