Have a prescription for my son since he was 6 mont...

Have a prescription for my son since he was 6 months old which is SUPPOSED to ready every month so we don't have to put in prescriptions. He is now 15 months and they still never have it available!! Also they discriminate because I have a pushchair so can't get up the stairs and refused to bring it out to me as they are ALWAYS understaffed. HOW AM I SUPPOSED TO GET IT??? APPALLING!