A. 1. Check your transaction history within the app to confirm if the payment was processed. 2. If the payment is confirmed, try logging out of the app and logging back in to refresh your account balance. 3. If the coins still do not appear, clear the app cache by going to Settings > Apps > TenderU > Storage > Clear Cache. 4. If the issue persists, consider uninstalling and reinstalling the app to see if that resolves the problem.

B. 1. Ensure that your payment method is valid and has sufficient funds. 2. If you used a third-party payment service (like PayPal), check their transaction history to confirm the payment was successful. 3. If you have a screenshot of the payment confirmation, keep it handy for reference.