I would bet the problem is with your wallet. You can use block explorer to see if you can see the transaction: https://chainz.cryptoid.info/pnd/ When I send PND I can see the transaction very quickly usually in a minute. If there is no transaction on the block explorer then the problem is the coins never left your wallet.
You are right, I see the PND are still at my wallet address but my android wallet says it has no PND left to send. How can I fix this?
I don't know how your Android PND wallet functions, but maybe it has an option to export the private key for your sending address. If you can get it, import that private key into PandaBank.