My experience is similarly bad. I purchased an android stereo from Navirelax. There were compatibility errors. Aliexpress offers a fraction of the cost to settle during the dispute period. The seller responded with their warranty and explained they would do everything to resolve the matter including up to replacement. I thought i'd give the seller the opportunity. After the dispute period passed, the seller hasn't helped or replaced the product. Its been 2 months, the seller now responds with stupid emojis.
If there is an issue with the item purchased, don't expect help. The sellers may not honor their warranty.