Vodacom *****ing my data I purchased

Vodacom has been *****ing the data I purchase from them and there doesnt seem to be anyone able to help. I get data with my contract, I buy an additional 1GB for 30 days on 2201/2020. I use 450mb in the entire month and now all the data is done! Where is the rest of my data? I have been doing this for months and each time its the same.

I try to call the call center but always get hung up on or the call fails after some minutes.

Who is the ombudmen for this industry? It needs to be investigated, The prices are crazy too but we don't even get what we buy.