Request Oasis NXT 25.2

Several audiologists have made several attempts to fit me with hearing aids, but none have succeeded. A wax suction performed by a doctor destroyed my already poor hearing. The only chance for me now is to set the parameters in my devices myself to compensate for the damage. It is no problem for me to handle this as I work as an electronics and sound engineer. Is there any kind person who can send me a link to a place where I can download software for Phonak and Bernafon?