Overcharging

I was contacted and told i could upgrade my contract last week. i went to my local MTN where i downgraded my contract and added an lte device which meant my monthly payment would be about 800 a month for the 2 contracts

1. i have had the lte device for 7 days the contract was 5 gigs day data and 5 gigs night data it was also a double up special i was told i would get and extra 5gig day and 5gig night at no charge

2. my cell phone contract is 529 a month i did not ask for any extras.

3. there is no way i would have used 10 gigs of data in a week they have charged me for an extra 5gigs at 62 rand 86 and another 5 gigs recurring at 377.19

4. only items 1 2 and 5 should have been included on my invoice. see attached 5. this is not the first time MTN have over charged me or upgraded my contract and not told me about hidden charges.

6. I also have no idea why i was charged for an entire month when my contract started on the 5th of october and the cycle restarted on the 10th of october

There billing cycles go from 10th of the month to 10th of the month