I've got premium till May next year, always buy on Black Friday sales, cancelled my renewal, I can't justify that price. Hopefully everyone cancels their renewal, they get the message and undo the damage.
You likely have it enabled by default, it's located in the view more or advanced settings on each specific wifi network, once enabled just forget network and reconnect, if that doesn't work, you can try enabling "WiFi non-persistent MAC randomisation". I'm not techie but that's what I did whilst on a camp site with a 30 minute trial, worked a beaut.