Lost data

My contract (airtime & data) came to an end more than two years ago but I continued with the contract. I then changed to "pay as you go" at the end of last month and bought 200 MB data for my phone while traveling since I have a contract for data via a router which I use at home. At no time did customer care tell me that if I want it to rol***** the data I must buy more data within 30 days. I have just LOST 65 MB data!! The customer care line operator now tells me that Vodacom only provides this information when the client asks. What utter nonesense - this is ****************!!! I am fed up with Vodacom and will be changing to another provider asap.