Edgars account department not functional

I paid R1100 via online to their Edgar's store card account on the 17th August 2020. I mistakenly left the last 3 numbers of my husband's account number, which serves as a reference for the payment. To date, they still haven't or so they claim to not have received that payment even after sending proof of payment and bank statements. I feel like Edgars is trying to recover their downfall through customer's expenses. They are now threatening us with debt collection which will impact negatively for us at NCR.