Okay, a few suggestions for the odd occasions when things do go wrong.
Check that you have bought from a TD here - there are plenty of fake TD websites out there. ie ones with the same name, but not the same web address. These scam sites will most likely rob you of your money.
If if things go wrong, work with the TD: they are trusted for that reason. If you’re getting nowhere then contact a moderator here who’ll try to assist. Remember, the moderators here are unpaid and do this as a hobby so will not be available 24/7.
Consider having the watch fixed locally to you - it maybe quicker and cheaper in the long run rather than sending it back to China.
Lastly, temper your expectations! These are replica aka fake watches, often assembled in less than ideal conditions. If you’ve received a watch that looks 99% like the gen at 10% of the cost you’re doing better than most people who buy ‘fake’ watches - usually on a beach somewhere in the world whilst on vacation!