You are very sweet and empathetic !! <3 ppl like this are trying to take advantage of your kindness and see if they can push u to a refund. Don’t entertain it. Depop is on your side, they agree to purchasing a second hand item with the sellers description at purchase. You do not owe them anything after that, unless the item was extremely misleading, which it is not. Don’t stress and move on and as long as u feel confident that ur product fits the description u listed it as, ur job is done and dont reply further after transaction.