Virus/Malware eating my data?

We have a 30GB allowance with Meteor and we hit our limit the other night with 4 days left to go which we have never done before,

Yes I've watched a few matches online, downloaded a few bits & bobs and the kids did rack up a lot of Youtube videos but it's not sitting right with me,

I've done the following to be sure;

Ran Malwarebytes and it came up clean,

Downloaded SuperAntiSpyware, ran it and it found 141 Adware cookies which are now removed, (not sure if these are even serious)

Ran Avast anti-virus and its clean also,

Opened Resource Monitor, clicked Network and I've found the following;

Processes with network activity

uTorrent.exe
svchost.exe
chrome.exe

Network activity

uTorrent.exe keeps popping up in between svchost

TCP Connections

nothing unusual, avast, explorer and chrome

any thoughts,
thanks

EDIT: just something to add, I got a 3gb add on last night and we've managed to use 600mb of it so far,

we done some online shopping last night, it wasn't used all day today and then a bit of general use so far this evening!!!

cant be right?