dear sir / madam

i have purchase letroz tablets from wellness forever lifestyle chemist & supermarket with the instruction given by dr. avinash dev who is doing cancer treatement to my mother chitralekha patole. that was course of 5 days. and the only 5 tablets cost rs.169. which is very costly for me. after using this one tablet my mom was suffering from giddiness so called up doctor he guide me not to use tablet. so i went remaining tablets ( which was packed only one tablet was removed ) to the above chemist. but he refused to take remaining tablets. actually im regular costumer of wellness forever chemist. my point in cancer medicines are so costly sometime somebody can not afford to purchase it so chemist should co operate and should replace the medicine but without guide he refused it so want to take strong action agaist such kind of chemist those who doesnt have sense of humour. and in future poor peolple should not suffer. please guide me what to do.