They did not add 6 months extra on their own, so I had raised a complaint through app on 15th. Complaint was updated with the details that - customer complaint is validated and billing team has been informed to update date and closed. And today, I do see its now increased. Next renewal is now mid-March 2022. So yeah, I think for the price and Hathway box I get - I am kind of ok with them now. Effective price of 535 per month + taxes for 1 TB data is fine for me.