Shoppers Drug Mart complaint: in correct amount of prescription

i am a long time customer of this particular pharmacy and have been ordering the same drugs for years and i always receive a 3 month supply in each time i order except during the beginning of the covid pandemic when like all canadians i only got 1 month. here is my problem at the end of january my prescription needed to be refilled, i order my pills and the person on the phone asked me when my 65th birthday was , i informed her in a week she said that my discount would take a month to be activated so she would give me one months supply and then in a month when my 65 age discount kicked in i could call for the remainder of my 3 month supply. a month went by naturally my pills needed refilling went to get them and i was only given 1 month i paid the price went home, april rolls around and i needed to reorder again by this time i request that i receive the full 3 month supply, i was informed by the girl on the phone she would change my oorder back to 3 months when i asked why it was changed in the first place. as that was not part of the prescription from the doctor nor have i ever received 1 month supply at a time her response i don’t know. i live 30km away from the pharmacy in a rural community drove into get myy pills, requested they check to be sure i got 3 months. told i dif asked why i only got 1 month last month when it should of been 3 months told i don’t know. guess what i don’t know isn’t an answer least not for me a long time customer. not impressed also was charged the same amount for il1 month as 3 months where was the discount. no clue