Check if all the information given is correct, that your method of payment is valid and that you are connected to the internet.
It's easy to add an additional card number or assume that some information is not required - did you know that your Maestro card actually has a CVV number, used for internet purchases? The more you know!

If you're sure you have all necessary and correct information and the problem still persists, please contact us at contact@lalalab.com and provide us with as much detail as possible: a screenshot, the action that triggers the problem, the error message, etc. We will make sure to investigate and fix the issue.