Totally disappointed

I would like to express my disappointment with shoprite in east london amalinda and spar in amalinda east london. This follows a statement made by tiger brands to return koo products to nearby shops and receiving a refund without any proof of purchase to be given. I had 5 koo baked beans and took it to spar in amalinda, which i was told could not be accepted if i do not have any proof of purchasing the items from that specific spar. I then said to the person assisting me that it is fine if that's the case. I proceeded to shoprite and at the entrance, i saw an employee and asked her about the return of these products. The lady told me that she did hear something of the return but are not fully aware of the return policy, but referred me to their administration office within the shop. I proceeded to the office and spoke to a lady from the office. This lady told me that only the products for the month of May would be accepted. I told her that my products are different months. Ahe then confirmed that she could not assist me. I informed my wife of this. My wife forwarded me the official statement from tiger brands which clearly states items from 1st may 2019 to 1st may 2021. I know now that i could go back to shoprite with the proof from tiger brands. My concern is about the peowho won't be able to produce this proof that i have.