Jehrek Dreamscape

Gets as far as loading cashier then says payment failed, sending me the following in email An attempt to purchase Linden Dollars for your account via the LindeX page on secondlife.com has failed. message on website is LindeX™ Exchange: Payment Cancelled We are unable to complete your request. Your payment was cancelled. Try Again

I have been unable to buy L$'s through the website or via SL in world, it's getting pretty desperate as my rent for land is due soon, I have phoned and they were useless, said they'd forward it on to tech team and I'd get an email (Which I didn't) has anyone encountered this problem/know of a solution? Thanks in advance.