At the moment you can’t.
I’ve had a couple of times that a item didn’t arrive from aliexpress and I always got my money back.The seller need to prove that you signed and received the item.
One time a item was broken or didn’t work properly. The seller was really annoying and the dispute escaleted to aliexpress. I provided enough evidence and I got a refund.
I’m really happy about the aliexpress protection system. It could be that I’m lucky. I also have ordered enough from aliexpress that I get extra protection time and I don’t know how the rules are for regular buyers