Child account is linked to a parent organiser with deactivated email

Hi, my Microsoft child account has been linked in a family group with just me (child) and the organiser parent. The organisers email had unfortunately been deactivated and unrecoverable. Now I need to add a new parent and remove the old deactivated one. But I can only add a new parent with organiser permission, which Is a deactivated email. I would really appreciate some help with this !