Do you have the private keys or seed phrase to the wallet?
If you do, you can import it on a trusted wallet software like electrum; ensure you're purchasing from the right source and verify the PGP signature.
Also,.check to confirm your server is properly synched?
If you do, you can import it on a trusted wallet software like electrum; ensure you're purchasing from the right source and verify the PGP signature.
I opened the wallet.dat with the latest version of bitcoin core but the public key which it gaves me, has no transactions 
Did you store more than one address on the same system?Also,.check to confirm your server is properly synched?