I had a bit of a mixup with BBTS awhile back and their customer service was great to deal with. Apologised and issued store credit quite promptly. I'm not a big fan of their "pile of loot" however. I had loot sitting there with pre order items for nearly half a year. Adding in more items just shot up the shipping cost as if they were being shipped individually, not as a combined parcel
In my experience, BBTS' POL doesn't really offer much of a saving