Cell C - Empty promises and poor service

The store in Northridge Mall failed to capture my banking info correctly causing my debit order not to go off on the scheduled date. Cell C then disconnected my Data sim (100gb) and my Cell phone contract. We went in store to fix the problem after enquiring why we were disconnected , the debit order eventually went off more than 2 weeks later. We asked the gentleman working at Cell C Northridge if our data would carry over since it was poor admin that led to none payment and us not being able to use our data. He said it would. 200MB of my Cellphone contract carried over but 21GB of my data sim did not. When we enquired about that at the start of the month we were promised it would carry over before Wednesday 6 March. It has not yet carried over and when my wife went to enquire last week she was told sarcastically that these things take time. So I am losing data that I had to pay full price for because a company failed to do their admin properly and give me false promises. Poor service and no idea how to treat a customer or give feedback.