Can you detail the nature of the error? exact message?
Did his card get any sort of authorization attempt?
If not, the issue may be with Lambda’s payment processor and attention should be paid there.
Please note: I am not with Lambda, just a curious end user trying to share my experiences.
If I were you I would try to call lambda and get them to address the issue over the phone rather than try to get help over the forum.
Best of luck.
PS - You could always move to a civilized country (just kidding )