My mum had a similar problem with her pharmacy, so she changed pharmacies. As it was a chain she also wrote to the head office and complained.
My mum had an op for cancer so is needing drugs to keep that away and she is on worfein and a few other things. My dad is diabtic and ona couple of different pills.
I am lucky in I have seven quite close at hand and a Boots Midnight Pharmacy that I can get to with a little more effort. When one was playing up I just changed and as he'd let down quite a lot of people word got round and he lost trade so was taken over by one of the chains and things improved.