We are very sorry to read your issue here. Best way to resolve any concern is to send an email to firstname.lastname@example.org. We are available 24 hours on all 7 days of the week to resolve your issues.
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We have already completed the refund process of Rs. 300 from Paytm side for our Order Number 47443285.
Remember, if you do not see this balance in your bank account yet, it is because your bank does not reflect this refund instantly. You could check with them on time it takes for such refunds to show up.
Paytm Customer Care