Aliexpress seller sent a "payment" on my account as a "refund" am I safe? or they could reverse it?

[Imjinah]

hi! I ordered something from Aliexpress but one of the item got damaged, so I ask the seller for a refund and they asked for my paypal. Now I sent them my paypal email , and this morning I received a  "payment" . My question is, is the "payment" secured? or the seller has some way to get it back? I am really concered that the seller has some way to recover the money back once I confirmed the packages from AliExpress, someone enlighten me please 

sorry in advance if I posted this on the wrong board

edit: added a screenshot of the "payment"