Hey King Rathore,
Thank you for sharing your concern. We sincerely regret the inconvenience faced.
After investigating, it seems that the Paytm UPI feature is facing some temporary external issues and our team of devs are in constant touch with Paytm team to fix the issue.
As a workaround, please try using another payment mode to purchase a Gold Coin bundle. If this still doesn't work, please share more detailed information and supportive screenshots.
This will allow our team to investigate further if required and provide an effective solution.
Hope this helped to solve your query.
game.tv support team