[Resolved]  Clay Telecom — Discrepancies in Bill

I went to US for couple of months and used Clay telecom's International Sim Card there which i took here from Delhi.
Now when i am back and I saw my generated Invoice I found many descrepancies in the bill.
They have charged me for sms chat on a particular number whereas I never used SMS chat from my number.
But they are not agreeing on it and moreover they deducted the invoice amount from my Credit card without my permission.
Please check in the screen shot(just a small part of my generated invoice) I have marked with Red they are saying these are sms chat whereas I never used my number for sms chat and also its impossible to send smses in just 2-3 seconds time difference for which actually they have charged.(check screenshot)
I talked to Priyanka Verma and Sangeeeta Rawat from clay telecom and everyone gave me the same reply that you used SMS Chat whereas I never used SMS chat on my number.
Priyanka's contact number is [protected].
Please help me in this.

Thanks,
Ashwaray