Promised Refund Still Outstanding

On 26 Nov 2025, I bought a 5 liter can of paint from this shop and realised afterwards that I am not going to use it. I did not open the can and returned it to the shop on 5 December, as not used and I was informed by a clerk in the shop, that I will be refunded. On 10 December I spoke to the owner of the shop, Rudi van Schalkwyk, about this matter and he said that he will refund me. Today is 19 December and he still has not yet refunded me and I did not receive any further communication from him, regarding this matter.