If you are trying to pay by card and the payment is failing, please get in touch with your bank. They can see unsuccessful attempts to use your card and will be able to provide more information why the payment is being declined and rectify the issue.
If you are still not successful with payment or paying by card is not possible, please see our resellers at https://www.manager.io/go-to-resellers
Our resellers will be able to provide additional payment methods such as direct bank transfers.