Apollo Pharmacy — You people are cheaters

Address:

Gulbarga, Karnataka, 585101

I visited apollo pharmacy at khadri chowk, gulbarga karnataka.
They provided me a APOLLO ADVANTAGE card and told me that i will get 5% discount on all products, card number is [protected]. Now today i purchased endura mass of cost 525 rs, i should get 25 rs discount but they didnt gave any discount. when i gave 530 rs they gave me endura mass plus some nonsence chewing gum of five rupees. when i asked to give my change they said we dont have change so giving me that orbit gum.
1)if you cant give discount then why you are giving the card.
2)If you dont have change then why you are running such shop.
By cheating us you are loosing YOUR CUSTOMER.