Walmart complaint: Negative Acknowledgement Annual Plan

Walmart allows account holders to place orders on line for curbside pickup. Orders under a specified dollar amount (e.g. $35) have a service fee added for the curbside service. I have paid this service fee when my order amount doesn’t qualify. In August of 2021 I placed an order and didn’t uncheck a box at the bottom of the order page that automatically enrolled my account in no minimum order fee (i.e. negative acknowledgement). I didn’t see the check box and didn’t uncheck it. I learned this month that this occurred (as they were about to charge another $85 annual subscription fee). I believe the negative acknowledgement is a dubious practice. I received no ation that I had enrolled in the program at the time of the August 2021 order. This is the least that Walmart should be willing to do to the user that they have subscribed. I spoke to Walmart on line and they are not willing to address my complaint.