I bought a foam mattress off amazon canada. Decided to return it. Surprisingly amazon.ca doesnt offer large item pickup like USA, and expected to return a kin

I bought a foam mattress off amazon canada. Decided to return it. Surprisingly amazon.ca doesnt offer large item pickup like USA, and expected to return a king size expanded 10" thick foam mattress to the local post office. I called them asking wtf, how am I supposed to return it. They gave a me refund, and told me donate destroy it myself or even just keep it. I decided to keep it