Is Zearven a Scam? Review of the Online Store

I am painfully aware that these cheap clothing ads that keep coming across my Facebook feed are a big risk. Some of them send stuff that is nothing like what is pictured in the ad. Some send stuff that is pretty decent. Sizing is a crapshoot. But all are alike in that they don't accept returns, unless you pay postage, which is usually more than the cost of the item.

I took the risk and ordered an item from Zearven. They offered a size chart and I selected a size that should have fit. The item arrived and did not fit. I emailed them and complained and to my surprise received a quick response that they were sending me the same item a size larger. No request to return what I'd received or pay for anything. A few weeks later I received the replacement. It fit fine and I am happy with it. But very surprised. So maybe the shop is OK.