There could be a number of reasons your order declined and it is vary rarely down to the amount of money you have available to spend. It could be down to security, for example not part of your normal spending pattern or could be a transaction limit, whereby people have a limit per transaction, for example of €1000 per transaction but they are not aware of this. Webtronic can tell you why it declined but cannot solve the problem, you must contact your payment provider or card issue to solve the problem.