Help!!

Final edit: got the pedal out. But is this seriously a thing that happens?

Can someone help me right now? The suspension thing (edit 3: thanks to the sticky I now know that the thing that fell off is just the bottom of the saddle stem) fell off and now the pedal is stuck in the hind frame. I stashed the mangled bike at the uni to pick up my daughter from the kindergarten in time (edit 1: was still late by ten minutes after grabbing an e-citybike). How can I fix this. I'm going home to find bike tools.

Edit 2: is this a thing? I was offered a three day rental from our local Junction store to test a Brompton out and even given a 10% discount were I to buy. It's been a load of frustrations so far as each time I fold it together in the wrong sequence something gets stuck or falls off.

Edit 4: I'm back and thankfully nobody took the bike! Here's a closeup of what happened. https://imgur.com/gallery/GBpmVi2

Edit 5: I managed wrangle the pedal out after lots of coaxing and twisting, but the bars are now scratched up pretty badly 🙁