User Activity

I have 3 account and all 3 have alot of 30mb data being used almost daily.if i added it up all these 30mb are using most of my data.Is lucky ripping people off of data?
Do you still get a Dollarama 20 gift card when you buy a sim card from there?
How to remove voicemail from account i don't have it setup as i don't use it.but I'm still getting notifications that I got new voicemail.