I have put it to max after now.. it was the default from the wallet.. i never touched it until now.
Can you advice where i can contact macbook-air or a quickseller?
Just send them a PM. Go to
https://bitcointalk.org/index.php?action=pm;sa=send;u=16114 to PM macbook-air and
https://bitcointalk.org/index.php?action=pm;sa=send;u=358020 to pm quickseller.
Also is it possible to change the fee after i sent already?
No. You can attempt a double spend transaction which has a higher fee and will replace this stuck transaction. This requires telling your wallet to forget the transaction and then you resending the transaction by spending the same inputs but including a higher transaction fee. If you want to do that, we need to know what wallet software you are using.
i am the receiver, willing to tip for the help also if someone can speed up the process
If the sender does not double spend the transaction, you can attempt a Child Pays For Parent Transaction. This transaction will have you spend from the unconfirmed transaction and send the Bitcoin back to yourself. The transaction will also include a fee which covers for both your CPFP transaction AND the stuck transaction. This also requires us to know your wallet software if you want to do this and need help. Most wallets will not allow you to spend from an unconfirmed transaction.