Straight Talk Bring Your Own Phone Sim kit includes month of Unlimited service

I purchased this kit from Walmart for $30 it includes the sim and the first month of service for the $25 a month truly unlimited plan. After I purchased this I was unable to use it with my device and Walmart won’t allow me to return it. So I have no use for it and would like to try to recover as much of what I paid for it as possible. I never activated the service because it said my device wasn’t compatible. So the sim has never been setup and the month of service has never been started. For new customers.Truly Unlimited data , talk & text. excellent for everyday use. superior materials and excellent craftsmanship ensure long-lasting durability.