Eezicoupons not deducting correctly

I always plan my shopping list and in doing so check the eezicoupons available as well as pamphlets for current specials. These I write down to ensure I pick the correct product that corresponds with the current specials and eezicoupons. Yesterday I only received a deduction on the eezicoupons of R42 when according to my calculations it should have been much more. How do they rectify this? I obviously bought some of the products only because of the eezicoupons making it worthwhile but the way the system is currently there is no way in which you can check that you do indeed get the discounts on the coupons as reflected on the website of Checkers.<br> <br> Kindly assist