I'd say I've been a good cutomer with Aliexpress, spent a lot of money on their Platform.
In December'23 I purchased a Ulefone 18T Ultra for £366, had it 4 months and it decided not to turn on, contacted Ulefone through Aliexpress messenger and Ulefone told me to send it back to them for a replacement to send back to me. Sent the phone back-postage to China £24 tracked. Heard nothing from Ulefone. So thought i would try Aliexpress customer service, The representative, said not to worry at all as "Aliexpress has got your back" . Aliexpress asked for video of the fault, which I sent.( Luckily I had taken 2 videos one clearly showing the small red light of doom on the phone screen)
I then got an email today from Aliexpress to say
"Thank you for contacting AliExpress regarding order 8181592580173017.

We cannot identify the problem you described from your evidence. So far your request will be closed for now. We are very sorry for the inconvenience caused to you"

So thats Aliexpress Customer care basically washing their hands of the issue.
I have followed Ulefone and Aliexpress instructions and got nowhere, I'm £366 + £24 postage out of pocket, with no phone.
I'm actually more disapointed with Aliexpress as I have spent £1000's with them and they have told me not to worry, when in reality, Aliexpress have not "Got your back" and they do not care at All. I will be putting a complaint in with Paypal. My advice to anyone thinking of using Aliexpress. Do not purchase any item over £50 and do not have any expectations when it comes to any after sales care when you have an issue.
That way you will save any disapointment, more importantly you'll save your hard earned money.
Update July 2024, Chinese customs have rejected the import of the phone back to Ulefone beginning of June and sending it back to me, 6 weeks have past since leaving customs. Still no sign of the faulty phone. couple of things to note. Firstly, the Chinese regeme are happy to flood the world with products, yet will not accept returned imports. secondly, If your out of the 3 month returns window, forget any after care via Aliexpress. In the UK we have laws protecting consumers. The Chinese do not have these consumer protections in place. Best to purchase goods in the UK if you want a longer the 3 month gaurantee, items cost more but at least we have consumer protection.
Update 28/01/25, just received a package in the post, to find it is the origanl packaged Ulefone mobile I sent to Ulefone back in May '24. The phone has not been looked at, still has the same faulty phone????