Appauling Customer Service and Pathetic LTE

I've been having on going issues since 28/09/2018. I received a new sim card on the 08/10/2018 and all of a sudden our usage has gone up to an average of 10gigs A DAY! Mweb cannot give me ANY info whatsoever and I should just accept that info as fact. I've dealt with several agents and a manager named Sarel, and the service is appauling. I have never dealt with one company where every single person has no customer service whatsoever. Their attitudes are horrible, they speak over you, and they NEVER provide you with feedback. To this day, my issue has still not been resolved. And I basically have to pay for wifi that I'm apparently using.