Data purchased on Cell C website not allocated and complaints not resolved

I purchased 100GB of data for a Cell C SIM card on 7 October 2019 using the online interface on www.cellc.co.za and paid the R1599 by EFT using the Payfast application on the site. The data was not allocated and despite numerous calls and emails to the Cell C Customer Service centre, the issue has still not been resolved two weeks later. Several of the service agents I spoke to promised that a supervisor or technical representative would contact me with feedback and this has also not happened. At this stage I want to be refunded and would not recommend that any customer attempt to buy data online.