I have exhausted all efforts in getting my mother coverage through Medicaid. I need advice on how to appeal this.

My mom had a stroke years ago, not only 1 but 3. She was deemed disabled from SS. She does receive a retirement check from Teachers Retirement System(TRS) every month, but it is minimal. I have applied for Medicaid, which we’ve been denied every year since her stroke. We tried to get spousal widow benefits. We were denied. Her insurance is forcing us to get Medicare. We received the first bill and they wanted $771. She can not afford this. She makes $12,364/year and they said this was too much. Any direction would be great. This has been the most frustrating thing and she needs to go to the Dr for prescriptions.