NO Replacement, NO refund, NO After sales Service!!!!

I have placed an order on 1 May 2022 with Makro online. My order was delivered on 4 May. I realized 1 of the items(floating solar light for waterponds/swimming pools) does not work. I logged a returned request on 6 May for a replacement of the same light as I like it. This however is where the nightmare started. On 10 May the courier came to collect the faulty light. I did not receive my replacement light. When I call in I was told that the faulty item has been send to the suppliers to assess before they decide if they replace my item or refund my money. I then escalated the matter. On 18 May 2022 I followed up again calling ***after not receiving any response from Makro Online and escalated the matter again (***). It is now the 25th of May and 15 days later after they came to collect the faulty item but have NOT to date replaced my item as per my request OR refund my money. Service is great up to selling items online but the after sales service is NON-EXISITING!!! As the customer I am suffering. No item to show for the money they took from me!