Amazon review: Returns

Last summer I ordered an item, but when I received it, I realized I had ordered the wrong item, so I arranged for a return. While arranging for the return, I saw several different choices as to how to do so. I chose to take my item to a nearby "Amazon drop off" location at a Staples store in town. I stood in line to hand my item to a store employee, who scanned the item and placed it in a returns bin of some sort. I did not get a receipt, but got a coupon which allowed me a discount in the Staples store, because I had used their drop off location for my return. The coupon said I had to make the purchase that day and that it would be void, if I tried to come back to make a purchase. At that time, I did not need to purchase anything at the store, so I threw the coupon in their trash. When I got home, I saw in my email that my refund was enacted because the clerk scanned in my return at the Staples store. I thought nothing more of it, until I got another email about a week or more later, saying that the item had not been received, and that if they did not get the item back by a certain date, they would reverse my refund! I searched and searched...I tried to email them at a couple of different email addresses, but they all got kicked back to me, saying the inbox could not receive any incoming emails, and to try the online "robot" customer service system, which I did, but there was no option to resolve the matter. Long story short, they took back the refund, so I went to my bank, and I got my refund from my bank while they investigated my complaint. A few days after that, Amazon must have lied, and my refund was again reversed! I have since taken all my payment information off of Amazon, and dropped Amazon Prime membership. I now do most of my delivery/shipping orders from Walmart.com, and never worry about their customer service, which has been excellent!