Unhappy customer!! Purchased a 150 cm Christmas tree and a 120cm Christmas tree was delivered

I ordered a 150cm Christmas tree on the 6th of December 2025 with expected delivery set for the 12th of December 2025. The Order Number: OD*** was delivered on the 11th of December 2025 and I received a 120cm Christmas tree. I called the call Center less than 10 minutes after receiving the order to let them know that it’s incorrect. I told the agent that I ordered a 150 cm Christmas tree and received a 120cm Christmas tree, I told the agent I don’t mind following the online return process however I am aware that it takes 2-4 days for the tree to be picked up and then I would have to wait sometime for the 3rd party vendor to approve the return or not. The agent(Mamello) that assisted me advised that yes that’s the correct process. I advised her that’s unfair as I specifically ordered a new 150cm Christmas tree for my son and if I follow that proceed, it means that my son would not have a Christmas tree even though the mistake was not on my side and I also advised Mamello that I am leaving for North West on Saturday the 13th of December and do not have time for this return process . Mamello spoke to her manager, she then got back to me and advised that there is nothing that they can do and that yes that means that if I follow the return process, my son will be without a Christmas tree over the Christmas period. I do understand that Mamello was following procedures but I do feel that her manager and Makro are failing their customers and handled this situation poorly. I am now stuck with a Christmas tree that is still in it’s original packaging and have to decide if I will keep something that I am not happy with and use it or wait for the refund which means my son may be without a Christmas tree during the Christmas period