Data going missing without a reasonable explanation

<p>So I purchased 1 gig data and received 1 gig free from MTN on 14/05/2016. Today, 23/05/2016 I only have 377mb left. How is this possible? I contacted MTN on 173 and they told me that I am using the internet excessively which is utter *******. The date and time they have on their system are times I am at work, so when the heck do I get time to spend 1 hour, twice a day on the internet? What doesn't make sense is that over the weekend I do not spend half as much time on the internet (This is during my free time) as in the week when I am at work.</p> <p>Please re-imburse my data, or I will have to move to another service provider. Just because you give free data does not mean that you can take it whenever you feel like it!</p> <p> </p>