[Seller refuses to cancel my order]

6 hours ago, mariashtelle1 said:

This is someone else’s topic and it’s better to open your own. 

 

However sellers can not mark orders as completed. They can deliver your order and you have 3 days to reject the delivery if they sent empty delivery and report him for that. 
Now your best bet is to open a ticket with support and report that seller. 

thank you for your advice! 
Yes I have just opened a ticket and also reported it to the support team. 

[Seller refuses to cancel my order]

Seller didnt deliver anything but insisted to mark it as completed.  I paid 100 bucks but i got nth