Cannot buy any data

I have never in my live received such bad service, I am on a flexi 200, I cannot buy any data! It only gives me the option for 3GB and 5GB, no option for 100mb, 250mb and 500mb. I have phoned about 10 times, no one knows how to assist me, all I ever have to hear is, have I tried to reset my phone,. One agent told me I am lying, that there is definitely more than 2 options to select! That's bad! I am not a stupid person! One told me I need to try the portal, same problem there! One told me I need to try to vodacom app, how the hell should I use the app without any data, it tells me no internet connection, the other one wants me to go step by step using the *111# option, how am I suppose to do that while I am on the phone with him? I cannot do anything on my phone because I can't buy any data, and it is scary that after 10 calls, no one can help me, that is really bad service, if this is no resolved within the next 30 minutes, I am cancelling all my contracts with vodacom! My number is ***