EXTREMELY DISSAPOINTED

I was at Mall of Africa on Monday evening for an exchange however I could not be assisted mainly because I did not have the receipt . I explained to the manager that I can provide a my bank statement as proof that I have purchased the item and the purchase was made les than 30 days ago. however the manager insisted that they cannot help me provided that I have the receipt. I left the item in store because I honestly do not understand why do I have to keep an item that I have not worn which costed me R1000 that I had worked so hard for. The is truly disappointing