How old do you have to be to set up a company? Is 16 okay for a small web startup?
Please allow me to refer you to two questions on that topic we have answered in the past:
– Can a minor be a sole shareholder in a company?
– Can minors be part of corporation?
Those answers should shed some light on your original question.
(a) You made a typo in the card number, CCV code, expiration date, name or address;
(b) Your card balance is too low;
(c) Issuing bank has declined this transaction for some other reason related to your account.