UPDATE UPDATE UPDATE!!!!!
So I got to the bank and I met up with the lady who I was liaising with. I walked with an excel sheet of all the orders and was ready. Ended up that only ONE person wanted a refund.
When we delivered the cakes on Friday, the person who I was dealing with (Let's call her Ms. N) skipped work that day so she put another woman in charge of collecting the orders (Ms. Z). Z also had ordered a cake and I guess when she saw it she decided that 6 inches was too small so she started to rant and rave and called Ms N to complain.
THEN Ms N called me to say that nobody wanted the cakes. Turns out that horrible Ms Z didn't even tell some of the other customers that the cakes had arrived. I guess she was too busy ranting.
So when I get there to deal with Ms N there are still cakes sitting there but when she calls the others who ordered they just come and pick up the cakes with no hassle. They did not even know the cakes where there. I took back Ms Z cake and that is the end of the story.
I learned A LOT.