Disappointed.

I have renewed my cell phone subscription effective 1 March 2020 with a top up business deal of 1GB at an additional R39 pm. This was never added to my account and when I noticed this in the next month, I was informed that this deal is no longer available and I now need to pay R59 but then I get 2GB. I accepted this, only to be billed R99 per month for the extra 2GB. I am now in month 4 since my upgrade and neither my billing nor my credit due has happened. I have been a loyal Vodacom customer and am truly disappointed in their failure to resolve my query.