Very unhappy customer - 2x the data a ****

I bought a data bundle on the Cell C app on 18 Feb 2019 where they advertised 2x data. I received my data, but not the extra data as expected. I called immediately to complain and was given a reference number. I received an SMS stating that my complaint will be dealt with within 24 to 48 hours. As I have not received any feedback, I called this morning to follow up. I was cut off twice. The second time after 7 minutes of silence. My husband then called the customer service centre and after 17 min of holding on and several transfers, was told that they could not find any record that the data bundle was indeed bought. I have since depleted the data in question?