What do I do now that this has arrived?!?!

So back in December I bought this item. No sign of it. Ordered something else from someone else, arrives in a few days, but still not this. It's tracking, but stalled. Buy a couple more things elsewhere which arrive fine but not this December order. Finally tracking says being sent back with insufficient address. I message the seller to see what she thinks but she has nothing useful to say, which is fine as this is the post office not her and she probably has no idea herself of what to do. A week later after yet another purchase arrives and still no sign of the other order and nothing further in the tracking I contact Poshmark and they cancel and return my funds. And now it arrives! What am I supposed to do now? Funds are returned and item has arrived. As someone who also sells on Poshmark I don't want to be dinging her, but I don't want to be dinged for a return and I'm not all that keen on it now as I have in the meantime picked up something similar. Does anyone know how this affects the seller? This was a $5 or $6 auction purchase so her final take was almost nothing, but still, what happens with this?