What do you mean by "turning in"?
Any bazaar fragments you've collected should be in your inventory.
If you're on mobile they might only show up in the fragments tab. Most will either come from the Pass (where you have to collect them after you've passed the milestone) or the Shop (where you have to buy them in multiples of 10 fragments using your lunar coins).
There's also a few from round-end chests (of which there's 6 prizes distributed randomly and you only get the contents of the ones you open) and guild ranking if your guild is in the top 50 (which should auto-add to your inventory at the end of a round).
I've had no issues receiving them from any of the above sources.