refuses to accept coupons

Refuses to take unileverdeals coupons, they told me that they only accept coupons attached to products, not mobile coupons. Also sunsilk shampoo and conditioner was advertised at R79.90 for any 3, yet I paid R84.95 for 3. Shampoo was hidden behind conditioner on shelf. Also they did not have other product that were on special such as omo washing powder. Manager could not be bothered to find out about coupons, rather told me to go find out.