Haha thats a bit unfortunate!
I have absolutely NO idea whether this will work, but maybe try what you do with wax. Get some greasproof paper on the bit and then iron over it til it melts. Then if it works like wax it should stick to the greeseproof paper.....
Although dont take my word for it, I doubt plastic and wax work in the same way!!
Otherwise...maybe cut a hole out and try to make it look intentional fashion-wise?
Anyway good luck!
id go with the attempt at melting it if the iron hot enough it should work
it was rather unfortunate! Only me could manage to do something like this haha.
I'm thinking hot iron, afterall, how much worse can i make it hehe.