Data charge although it's linked to WIFI most of the time

<p>I've noted the past two months and also now on my latest invoice that Vodacom has been charging me data that I'm not even using. For most of the day my phone is linked to the work's WIFI (not data usage) and at night it's linked to the homes WIFI (not data usuage). This morning I got a message saying my data bundle is finished, how is that even possible if my data is switch off on my phone and I'm only using WIFI? As my husband previously had the same argument with Vodacom, you probably going to tell me, well you have to pay or your service will be suspended, hows about Vodacom sorts out the DATA issue as I'm not the only one on Hello Peter Complaining. I've also noted on my latest invoice you are charging me admin fees for my online / over the phone upgrade, It's noted on your website that you don't charge for any fees applicable to online upgrades, yet I'm charge. I'm really not impress with Vodacom, in this difficult times you are still able to charge people for data that they don't even use, just so most probably you can have a Christmas Bonus.</p>