Fridge fan problem

I purchased a Whirlpool fridge from Amazon last year, and it is still under warranty. During the last month, I noticed irregular noise from the fridge and found that the fan blade inside the freezer was broken. I contacted the Whirlpool service center and raised a ticket for repair. Even though the fridge is under warranty, I was asked to pay for the new blade, which I agreed to do. After several follow ups, a service engineer visited my home but brought the wrong size blade. This happened twice. It has now been more than a month with no resolution, and the issue has become worse, as the cooling inside the fridge is not functioning properly. I have not received any resolution from Whirlpool so far. I request Whirlpool to inspect the fridge and resolve the problem at the earliest.