Delivery failers and poor communication

I'm complaining about my order that was supposed to be delivered On November 30th However I've received notifications of three Failed delivery attempts firstly The issue was due to an incorrect address which i don't understand how and i have corrected now it tells me that it is"tel no answer "reason and now indicates that my order will be returned to the sender. I'd appreciate it if you could help me understand the reason for this issue and how can we resolve it because I really need my order.