Unfair treatment

The manager refused to sell me plastic chairs that are going for R8 each. I went on the 12 Nov 2025 and there was no stock.They said I should come the following day 13 Nov 2025.For sure they agreed that the delivery arrived but can't sell them. The manager said I should come on black Friday and even said I won't get them at this price. He didn't treat like a paying customer.