Apologies if some one has covered this, I did read all comments however I did skim a few. I too second BMSbattery that is my 48v (paid £150) some China sold only LG brand cell, it's 2 year old and works well. What payment method did you use? I believe paypal has 180 days to file a claim, gather as much evidence as possible. If you used a card debit or credit you can file a "chargeback" I have never used this option but if you are unsuccessful, nothing ventured nothing gained.
I take it you have not read all my posts, this battery was only 8 months old, also its too late to do a feedback, as no where to do it, Plus I always got to chat to an agent 8 in all, also sent several messages to seller, plus e-mail, also an agent said they also sent a mail to the seller, asking him to get in touch, yet again nothing. now they have stopped me contacting an agent. I was also told to upload images of the battery plus a short video, to a web site which I did. Now I have no way of chatting to a human, as like i said they seem to have stopped me from asking them questions. all these 8 agents I chatted to all said same thing they will help me. But nothing has been done at all. its really bad you cant get to chat to a human, just stupid Bots. and they are just programmed to tell you a certain amount of questions. if anyone knows how to contact a human on AliExpress please post here. Im just waiting now for 1 item I ordered. and will be closing my account.