R100 Call Limit Exceed to R208

we went online, via *111# and via the app, none of which were working. To be safe I loaded 250MB data to the line at 11am, as this line soft locks once it reaches a limit. Between 15h32 and 15h40 I received emails notifying me of the usage and at what percentage it was, at 4pm I received notification that the line was being locked. I checked the account, there was a limit of R100 before it locks, I saw an amount of R94 under data usage, which is strange because we loaded data at 11am!!! Calling the call centre she told me it was locked because we went over, I questioned as to why it didn't lock in the morning? I remained on hold for 45minutes with no resolution. I removed the call limit and to my shock the amount went up to R208 (which has been increasing by the minute this afternoon)!! Now tell me HOW does it exceed a R100 limit? Now tell me Vodacom, your systems did not allow us to see out data balances, your systems took a call limit over the limit that was allocated, your system locked a line 5 hours after the call limit was exceeded. I reported the issue on not being able to check data 7 TIMES today!