Theft of data

I have had the remaining 14GB ****** by MTN from a 15GB/30-day, which would be allocating 500 MB/day, over that period. REQ***. The app gave me a notification to manage my recurring bundles and remove them if I didn't want them to recur. At no point did this mention or warn that the daily allocation would be stopped, as it was expected that the purchased bundle would be automatically repurchased the following month, and this wasn't wanted. At no point was there any proper explanation or warning of what the removal would cause. Now I have been told by MTN, that I am at fault due to this and they will not do anything to rectify the issue. Never mind, that the ticket was open for more than 2 months and I had to constantly follow up with them for feedback, as no effort was made from their end.