^ Have you tried the live chat? https://support.kucoin.plus/hc/en-us/requests/new, just click on this link and find the live chat on the below screen on the right side corner, you will find the color green logo chat.
Probably, you did not receive a response because it has come from their bot, try to use human service and access the live chat, it is an actual person who will assist you. It will worth it if you will try how many times until you succeeded.