Missing airtime and Data

<p>My airtime and data keeps going missing every time I recharge. Solutions Dept has been refunding me but it still goes missing. They say my phone is always connected to the Internet of which its not the case. They advised all sorts of things to be done on my phone, which is done but the problem still persists. Who is *****ing my data and airtime? I'm even afraid to recharge this phone because of the problem. The phone I am using is a Samsung Galaxy S6. I have an S4 and S7 but do experience this kind of problem. Please help ...</p>