No communication

I bought shoes for my son today and he is currently not well and was unable to come with me. I got him and the shoes did not fit and so I went back to the shop only to be told that they no longer do refunds and therefore I can only exchange. The money I had was for shoes and there was no other shoe I could take. I was supposed to be told upon purchase that there is no longer an option for refund. Now I have spent the shoe money I had and my son has no shoes. It's totally absurd, it's now operating like a Chinese store. Very unhappy as I was not made aware.