My mother (92) wears a hearing aid. She went for a 6 mos check up and the Technician convinced her she needed a new hearing aid. She signed a 3 years contract for $9,000. She was so embarrassed that she was intimidated into signing and she did not tell me until I saw the bill on her credit card (I manage her bills). I want to call the Hearing aid company and asked for her money back. As a POA do I have a leg to stand on?