Hi Norma,
I agree it would be very aggravating. If it was a different drug it could even be life threatening. Having to make the request a third time is completely irresponsible. It is time to write that letter to the store manager or whoever has the authority to get something done about it. Even if it were to get done this time it is still time to let someone know there is a problem. If no one ever voices a complaint then the manager thinks everything is just hunkydory (fine) and nothing gets fixed.
I worked in customer service for about 35 years and believe me feedback works. Good or bad.
Hugs,
Laurie