Refusal to pay refund

My order # *** placed on 2 November 2023 consisted of 3 orders 1 x Leroy Merlin and 2 x market place products. the one order from Fine Living was only delivered yesterday, when I placed the order the delivery fee charged was R600.00 (that I Paid), when the order was processed the delivery fee was R275.00. Fine Living aka Calasca state I must get the refund from Leroy Merlin and Leroy Merlin states I must get it from Calasca. I contacted ***, *** and contact @leroymerlin.co.za. Nobody is assisting. Calcasca I mailed ***, *** and *** - no concrete answers have been received.