The online payment is provided by PayPal so the problem is something that is out of the club's control I'm afraid.mac wrote:having just attempted to join I feel you should know I was refused on payment as it said "this card cannot be used try another" As I am using a Black Mastercard that I have to pay for the privelege of using I think the problem may be at your end not mine
I've googled for PayPal and Black Mastercard and can't find any specific issues which are noted.
I would guess that you don't have a PayPal account and so are using the one-time payment part of the payment screen and I guess you aren't happy to use another card as otherwise you would have just done that.
To be honest I'm not sure what to suggest other than to try again, use another card or to post a printed form and cheque or join up in person at next thursday's game.