Promotional deals

Dis-Chem is currently running a promotion on Panda diapers for babies. Buy 10 and get a free pack. Every purchase on this diapers must be swiped with the Dis-Chem Benefits card. When you buy your last pack, you receive a sms with a wi- code to collet you free pack of diapers. Obviously the Benefits card records all purchases made on the diapers. I bought 10 packs. Received my sms. Now Dis-Chem has a lot of issues. Now I have to present all slips which proofs that I must receive my free pack diapers. What is the point of this promotion if there is no clarity on buying this promotional deal, terms and conditions highlighted before purchase on presenting slips etc... What is the point of the benefit card if it deemed useless when recording the count on specific purchases. Dis-Chem Raslouw sucks!!!! I will never buy there again.