Problems with Aliexpress

Aliexpress changed from a user friendly to a useless internet shopping company. I tried to send the an important message in connection with possible *****ulent seller/shipping company, but to contact them is impossible. They had a very useful chatting facility to report problems with sellers, but that does not exist anymore, you run in circles to try to contact them. I sent them emails to "aliexpress.com" which say Aliexpress Customer service on my email to them, and they sent me an email back saying that this is the wrong email address, supplying a link, but my tablet cannot open the link. What must I do?