Lynn Terra

I recently was charged $8 by Linden Labs for "Recurring Mainland Fees (up to 1024 meters): $8" The thing is, I reverted to a free account before my account cycled to pay for membership again, which before I could ot that I had to let go of all owned property. I even checked my account online here and it says I own 0m of land and also have 0 to use and that my next billing date will be August 8th. WHY am I being billed for something I do not have NOR own? I do NOT want these fees reoccuring. This is why I reverted to the free account in the first place. Will someone please explain what must be done to make this BS stop?