Vodacom *****s data from clients!

Our data has been disappearing at the exact time every month. In April our day data disappeared around the 15th which was a huge inconvenience. I decided to wait for mid May to use my day data on my router so that it doesn't run out unexpectedly. Imagine my surprise when I try to connect my router on the 17th and it gives a message that I'm out of data. This is clearly vodacom's elaborate plan to force current clients to take uncapped data contracts. I'm disgusted that my data was ****** 2 months in a row and yet the night data connection has no issues.. Why should I pay the full installment for only half the data??? Bring back my data or cancel this useless contract! I refuse to continue supporting a bunch of *******.