Menards review: Warranty

I purchased Maytag appliances (Refrigerator, Range, Dishwasher, & Microwave) I purchased an extended warranty on the refrigerator. It did not name the appliance on my warranty but listed a SKU. 2 years later I have issues. I contacted the warranty company, and Menards submitted a warranty for the microwave. I contacted Menards and spoke to Nate, one of the managers. He told me they do not have a copy of the transaction and to send them my paperwork. I did this and have since reached out two (2) times and no one will answer me. Any suggestions on how to proceed?