When I found the replacement battery I needed for my laptop on Tmart.com, I verified before since I didn't know the store. The first review I found was positive, so I bought. Unfortunately, I did not realize the BBB's rate for Tmart.com is "F", and for good reasons.
As indicated here, Tmart doesn't ship you what you bought. In my case, over a month after my order, they refunded me. The reason they invoked is terrible (no, I did not request a shipment to the skies or to another planet):
The "compensation" they offer is even worst:
Coupon Code: Se7en
Valid Date:From 2017-08-07 00:00 EST to 2017-08-31 00:00 EST
That's right. A 5% discount from a worthless company valid for 3 weeks.
But the worst part? They are still "offering" me the very same product, supposedly shipped to the very same impossible-to-reach location.