1. do what to get authenticated
2. in case you have the license number, its better to open a support ticket at https://account.blesta.com/client/login/
3. in case the license is really valid, @Paul or some one from blesta will help you
4. in case the license is not valid, again, they will help you how to proceed, also, in case the host is cheating on you, blesta will take proper action
5. if you feel this is helpful, like by pressing the react button
wish you happy blesta-ing
in case you still require more help, let the forum know