Data disappears overnight

<p>I bought 1GB of data last night around 7pm, did nothing extraordinary on the phone and went to bed just before 10pm. I switched off my celluar data as usual and I slept. I woke up to find my 1GB gone!!! I called the call centre they cant really tell me what happended coz they dnt know. I had data that was scheduled to be forfeited on the 14th of March 2017 but out of that data there was only0.99mb left so realistically only that was meant to be forfeited not my new 1GB that I topped up with. My applications dont run in the background and they only update via wifi not using my data. Vodacom can i please have my data back coz im almost certain you guys forfeited my new data?????? Please fix this, I want my data back. I hadnt even used it and it just disappears??? </p>