It strange for me.
The way it works for me is that I am able to deposit using master card but not able to withdraw. My master card is not a debit one, but a credit master card that can also accept money to be paid into my bank account, but bet365 do not give the option of master card for withdrawal, only wire transfer.
I understand. Is it possible to make a debit card just for gambling? It is usually free. Of course it is not the best decision, but if you often gamble bet365 and often deposit/withdraw money it can solve the problem.
I use mostly debit cards and didn`t test credit cards and don`t have such a problem.