Purina Cat Food Coupon False

I went to Pick and pay Sunward Park Boksburg, Registered to give the 28 Day Challange a try as i Always use different brand , after a mailed coupon nobody could help , the Que was long and manager treated me like i am stupid cause the coupon mailed doesnt work ...# Firsttimebuyer and already dissapointed you shoul stop the coupon thing its a lie