Hearing aids for 95 year old

My Mom needs to have her hearing aids replaced. She's on Medicaid. A 
hearing aid dealer that's been repairing her old hearing aids told me 
that Medicaid will pay for hearing aids. They delivered 2 Oticon Gaia's 
to her in her nursing home without me being there. She was able to deal 
with  in the ear aids from Hearx before they failed. These new aids have 
an antenna sticking out next to a button and a dial. She won't wear them 
because  they don't even fit properly. Before I read these people the 
riot act, I'd like to offer them suggestions as to what simple, no 
adjustment hearing aid she could use easily. Changing the battery is a 
real challenge for her and needs help with that. I'm looking for a 
hearing aid that has no adjustments after they have been programmed, 
just on and off. Any help here?

Traveling