TELKOMS DATA IS ROBERY!

I have been allocated "20G" on the first of this December, 2 days later when I check I'm left with only 3G, which is highly impossible. My night data also showed a balance of 10G from the 2nd of December, so basically even at night they saying we are browsing. So i went to the online chat and spoke to the ever rude Mduduzi Ndlovu who doesn't seem to know what he is doing. He explain to me the data was used by internet which I responded that data is meant for nothing else but internet and I need a report that shows which internet is that. He further belittled me and told me I can log a dispute which will still be sent to him to resolve, kept asking how do I then log a complaint, he said I can only log a dispute which will still go back to him, So basically he is saying he owns Telkom, all complaints and disputes go to him anyway and there's nothing I can do. I dispute my usage! Telkom needs to bring back my data cause clearly I wasn't allocated 20G, I was probably only allocated 5G and because we don't check allocations regularly that's how they rob us!