Cruel bastards, some people have absolutely no morals. I'm sorry that happened to you
Can you go to a charity shop to replace them? There's loads of nice clothes in charity shops - I buy mine from there for like 2 quid an item, and usually no more than a tenner for nice (was) expensive coats as I have hardly any money. Just needs a wash and possible debobbling, which you can do with the cheapest razor on the planet (trust me lol - don't use expensive ones).
Or the other option is, there are charities out there than can help you. It's different everywhere and it depends on circumstances I believe, I'm not entirely sure.