Walmart denying a refund after I received the wrong order

I placed and picked up an online order on January 17, 2025. Upon returning home and unloading my order, I discovered much to my dismay that I was given a wrong order. I repeatedly tried to call the store and no one answered. I called the 800 customer service, explained what occurred and was told I would get a refund. I had to call many times and was assured I would get a refund. For each call, the Walmart store on W. 86th St. in Indianapolis, Indiana told the 800 customer service that I was given the correct order. After being persistent and getting my financial institution involved, I finally received an email a whole month later that a refund had been initiated. Seriously! All of that aggravation over a refund of $129.35. After 3 weeks, it became an issue of disrespect, disregard, incompetence, and customer abuse. Walmart will never get another dime from me.