Defective Appliance

We purchased a refrigerator a month ago. We notified the seller 3 days later that the fridge is leaking, we also took pictures and sent it to them. They sent someone out to check the fridge a week later, they found a fault with the freezer so they replaced the part that was faulty but the freezer still had a fault. So they sent someone else out to check it. They still want to fix the fault. When I asked the 2nd repair guy about replacing the fridge, he told me that they can only replace the fridge within 7 day, I told him we reported the leaking within the 7days so why didn’t they replace it instead of sending someone out to check it and replace parts. It has been a month and the freeze is building up with ice and they don’t want to replace the fridge. They just want to keep fixing the brand new fridge and make it worse.