Balance is not correct, I sent all of bitcoins to different wallet, but transaction is not available, it shows up in the screen, but it writes 0 confirms and not available in blockchain.com
To unstuck such a transaction, shut down bitcoin-qt and launch it with either
-zapwallettxes=1 parameter or
zapwallettxes=1 in the config. This will remove every transaction from your wallet which is not in the blockchain.