@petze That's a shame and your situation is very rare as there have been minimal operational issues for this a/c and zero refund requests as things stand. The skies are fully of happy Bonanza flyers currently with you being the exception.
We really don't want you lumbered with something you've paid good money for and are unable to use. Can I not suggest you open a ticket with our support team and get them to try and help you. They'll also liaise directly with the developer to try and find a solution for you. Is this not an option for you?
Support team can be reached here: https://support.justflight.com/support/solutions/folders/17000141909