Unwanted service (MTN Xtratime)

I'm really disgusted about this new, Xtratime data from MTN, they've *****ing my airtime,I have Wifi @ home And @ work,I will never use Data ever But now all of a sudden,They claim I am owing them data from them. I am really ****ed off, about this unwanted service they are forcing On me, customer service for MTN, I think they are dead or benefitting From them ****ming us.Sies this People are real parasites.