Rotten maize meal at Spar Madadeni

SuperSpar Madadeni sells rotten maize meal which is a spar brand. I bought 2 x 25kg spar brand maize meal. I opened one bag and it was rotten also opened the second bag which seemed to be fine. Then I took back the 1st opened bag to Spar and they did an exchange for me. When my mom tried to used the 2nd bag of maize meal I left which seemed to fine on top. When she scooped it she realized that the 2nd bag is rotten too. The maize meal was bought on Sunday 17/03/2023 at 12:50. I tried today (Monday) to call the store number to complain but is always engaged