Faulty sizes and bad customer support

We received crocs as a gift for my daughter last week. She wears a kids size 6, but when we received it they were smaller than her size 5 shoes.

We wanted to exchange them and got the receipt from our friend but to exchange it online was already expired (She purchased it end of July). However since it is a manufacturing fault we feel that it should still be exchanged. On the website it says "If the goods are faulty because of the way they are made, you can return them within 6 months of the date you bought them."

I sent photos to the customer care line to show how small this size 6 is, literally smaller than all the other shoes in my daughters cupboard, even her old size 5 shoes.

We just want to exchange it for a bigger size, it's still brand new since we only received it a week ago.

But Abdul didn't reply properly - gave short answers with no suggestions to solve our problem and just constantly said that we were past our warranty date. Which is not true since this is a manufacturing error on your side and falls under the 6 months faulty return policy.