Unimpressed

i feel as though i'm being held at ransom by MTN and being held liable for charges that are not of my doing. I have logged query after query and know one has had the decency to address the question I raised. MTN says I owe them R 3400 for the period June to August ( MTN was on strike) which ideally equates to my monthly charge of R 1100 over the 3 months. This can only mean that I was double charged my monthly billing over that period. I have been paying my monthly billing without fail but have refused to settle the R 3400 amount as it doesn't make any sense. Upon analyzing my own account over that period I have noticed that in June my data usage amounted R 2200 how is that possible if 90% of the time I'm in a wifi zoned area at work and home. So, basically MTN is telling me in just that month I used up +70gigs of data which is absolutely absurd if over a period of 5 months Jan to May I over spent in data by R 300. MTN must sort this mess out as it absolutely UNACCEPTABLE.. I want a full explanation and for my line to be reactivated IMMEDIATELY. I have a family that needs to/I get hold of during emergency. I intend cancelling my contract and moving to another service provider.