Paytm Postpaid — False charges

I have paid rs 1334 amount in the month of june for paytm postpaid but it is realized by them on 28 August by paytm, which results to wrong late charges of apprx rs 1220 of 2 months ( july, august ) of the amount which i already paid. Due to this I'm unable to pay the balance amount of rs 895

I request to waive off these charges so that I can pay my balance amount of rs 900.

Please update it on my paytm account fast and do needful.