Matrix Cellular — overcharged bill - china

Address:

Chennai, Tamil Nadu, 600091

Date: 21/10/2019 to 03/11/2019
Basic plan: 2500 + 18% gst

I have taken diamond postpaid plan for my travel to china for 15 days and surrendered my sim on exact date when i landed back to india.
They have taken 1 month of time to give my final bill after many useless follow ups.

And here comes twist & shock upon seeing my bill amount, they have charged 13937.96 for my whole trip. After analyzing the itemized bill i found there is big fraudulent happened in data handling.

1. They have accounted even 1 kb as 1 mb
2. Found lots of duplicate time stamp entry

And the above makes my bill amount huge for 2 weeks travel.

The most interesting part is while am asking about this scenarios they simply saying it was the bill given by china network provider we are not responsible. How comes this irresponsible answer..??

I have cross validated our indian telecom service provider bill as well there is no such scenarios happened.

Now am thinking to file a complaint against my bill