Struggling with User Access

Hello all... reaching out hopefully looking for an alternative angle to gain access to our MYOB data file as Owner.

Our bookkeeper passed away very suddenly 2 months ago and as the sole "Owner" of MYOB she had complete control of the accounting system for our NGO. We have access to MYOB as a "file user" only, and so we have our hands tied, in relation to now accessing many functions. We did raise a support ticket with MYOB, but they have asked for a death certificate, which is not available currently from the family. We found also that MYOB support called the bookkeepers mobile, weeks after her passing and her husband is not in a mental state to deal with any of these requests. We actually have found MYOB support quite insensitive to our needs, and the family's privacy in this terrible time for them. We have since found they have closed our support tickets raised also.

We are happy for the bookkeeper account to remain but feel there must be a way to elevate another user's status to Owner, rather than request a death certificate from a grieving husband. Surly staff leave, and situations arise where new Owners need to be appointed.

Please any advice or historic success in gaining access to MYOB, as an owner, so we can run our business again comprehensively 

Any support appreciated.