MTN agents totally clueless or just lazy

I left Supersonic to coome to MTN. Barely a month with MTN and I have problems. Supersonic was bad, MTN you worse. Your agents at the call centre and in your branch are imcopetent and clueless. After several calls yesterday, no one is able to help me. My last call was with your agent Yonela N****eni who promised to email me a detailed statement of my internet usage. It is almost 24 hours and I'm still waiting. Your app says I have used 300gig for the last 30 days but your agents says I haved my 500gig. Totally clueless!