Very disappointed

Hi every month I'm forced to use pharmacy direct due to my medical aid, I register my chronic with them, but for the life of me I have no idea how do these pharmacist dispence medication, if they can't read simple instructions, they have been issuing me with wrong doses for so many months and I have to use my own airtime to call them and it's still doesn't get sorted out, now I'm taking incorrect doses due to their negligence.