How to store weed cookies for a while without a fridge or freezer?

My plug is going traveling for 8 months so she sent me a big supply of edible cookies to last me until she's back

How can I store them so that they don't go bad? Or atleast make them last a little longer? I can't use a fridge or freezer because I live with my mum and I don't want her to find them, plz help, ty

I'm trying find one of those teeny tiny freezers that fit like two drinks cans in to put under my bed but can only find fridge versions ): would that help maybe? They're kinda expensive

Trees sub told me to just discard them and informed me they can get invisible mold that I've almost definitely consumed ):

They were £60, pls help, that's so much money to me, I live on disability money, why have I done this to myself 😭😭