Exchange refusal

I bought clothes from EAST LONDON BUFFALO STREET JUMBO CLOTHING on the27 June 25 and returned clothes on the 30 July 2025 for exchange, the cashier refused to exchange qouting a 21 days excharge rule. however, I explained that I was out of town to a rural area for my child initiation therefore, I could not exchange then, I only got time to do so in July. I strongly believe the customer should be given an option to take clothes of the same value if no cash refund is allowed.. But Jumbo is really a profit maker, customer's feelings are not considered at all.