Hello, I am a missionary and an audiologist in Albania. Recently I received a gracious donation from Starkey Foundation for 30 Nathos M hearing aids which are rebranded for NHS. The folks at NHS gave me a code which was for the Nathos Micro W and not the Nathos M. Upon installing attempt it said "invalid code". Granted these are older hearing aids (2011-2015) but they are still valuable for the folks here in Albania who usually only make $300 for their pensions. HELP! I need to be able to program them. Appreciate your swift replies!!