Disapperance of data

I took a 24 months contract for data which comes with a router last year September 2016, for the first time data disappeared in my account, I promise you nothing has changed on my side, when I call their call center 081 180 they told me I was suppose the router on and off when I want switch between the any time and night data so that I don't use any time data at night more than half way into the contract I only heard this for the first time today, they said I was suppose to be told by branch (East Rand Mall) that sold me the gadget, I went there they told me they can't help me they also need to call their call center. I tell them I'm a trader I need internet access ,sorry we can't help you they tell me, can someone please intervene in my situation I need data my ID number is ********** 736088