Vodacom app mailfunction

Hi all, I felt that I need to share this information as it can happen to anyone who has downloaded the Vodacom app the app displays information about you balances that is not accurate and will deplete your available airtime, the app and can't do simple calculations according to the app 4*4 =29. Please take note of this as their only response is from them that you had to checky *111# for accurate details. Why create an app for ease of access and still have to rely on ussd code.