I DON'T GET WHAT I WAS PROMISED AND MUST NOW PAY FOR IT!!!!!!!!!!!!!!!!!!!!!!

I have upgraded to a smart broadband double deal (it is where you get 20 gigs daytime and 20 gigs night time data) for R289. My account was more than R400 last month (apparently because of prorate payment), now my account stands at R329.00.... What happened to the R289 deal????????????????? If I log onto the Telkom app - my data is displayed at 10 gigs day time and 10 gigs night time. What happened to the double deal.??????????????????????? (the deal code was loaded under CCL ********** ). I am not happy at the moment - why if the package gets sold to me should I phone and follow up. I did phone, I was told that the person will look into my account and mail me - which obviously did not happen. And I was told that the app is not accurate - why have a app at all then - fix the damn thing.