trendsuniverse.netは安全ですか？

I Ordered shoes the same size as my other shoes, they were too small and I asked to exchange them for the next size up. I was told they will not give an exchange or refund unless they made a mistake. As far as I’m concerned it is their mistake as their size is smaller and not the same. Nowhere in their ads does it state there will be no refund or exchange due to sizing, not even in their return policy. Horrible experience