Complain

I went to clicks mall of the north to purchase a medicine for son to boost concentration and memory of which I was looking for exel n they recommended mentat Himalaya, went back home n gave Tha med to ma son wich was on the 27 July 2021 n continued giving him that untill I discover that the medicine has expired since March 2021, I went back to the store n asked for the store manager n to my suprise and he said there was nothing he could do except that he is sorry, so iam frustrated because I am more concerned to the extend of the demage that it might have cause to my son.