Postal Locations

My 91 year old father has had to go without his medication because the mail man would not leave his mail in the box. Now he isn't delivering my mail, he said it didn't have in care of me on the address, said my mail had my fathers name on the package!! It didn't !! ( we have the same last name which is on the mail box) We have missed much important mail. How can I get the Cornish post carrier to be more careful in reading the name on packages? I've talked with the pots office, done everything they have asked me to do to fix my fathers problem, now the mail deliver just seems to be having a problem! It seems he is being very neglectful in his job!! Other households in Cornish, ME have multiple families living on the same property, DIFFERENT names, one mail box, they have no problem receiving mail. My father lived in Colorado with my sister the last 6 months, three different families (names), same property, one mail box, all got mail no problem, same government system. Whats going on?

I've had more of my mail, never make it to Hiram or be sent back or deemed undeliverable, in the last 2 years than the rest of the years I've lived here. How much more incompetent can it get over there in Cornish? Please tell me how you would like me to address my mail so it gets here. Thank you!!!!!