Poor service

I am so dissatisfied on how shein has handled my current order.i placed an order on the 7th of November and paid customs and duties on the 10th.On the 11 i received a notification that my order will be delayed by 3-5 days and ever since its notification after notification about delays.I have ordered the items for certain occasions and two of the occasions already passed meaning most of the items i ordered will be useless the time they decide to deliver my order.my firat attempt at sending an email to shein was successful but now they are no longer replying to any of my messages on facebook and m redirected to a robot.i tried contacting the customer agent but my ticket just says is open but with no reply from the agent.I tried to email them again but i got an automated non-reply email saying that shein can be contacted from the robot only!I atleast wanted to cancel the order and get my refund since they failed to deliver but i cant get hold of anyone to send my complain to since i keep on getting redirected to a robot agent