Incorrect data loaded

On 25 July 2019 I went to the Chatz Connect store in Tygervalley. I took out a data contract with Vodacom in terms of which I would receive: 30 GB anytime data + 30 GB anytime data (60 GB anytime data in total) + 30 GB nightime data = 90 GB data in total. However, from July 2019 (pro rata) and the months of August, September and November 2019 Vodacom only loaded 30GB anytime data plus 30GB nightime data. This means that I did not receive the additional 30 GB anytime data for the months of July (pro rata), August, September and November. Because my data ran out regularly I had to buy top up data at an increased rate which means that I have incurred out of pocket expenses in addition to not getting the total amount of data that I had signed up for. I have spoken to customer service many times and eventually even got contacted by regional manager Erwen Japhta. I have since received 60 GB anytime data but have not received the data for the months of July, August, September and October 2019 mor have I been reimbursed for the additional data I had to purchase because of Vodacom's error.