Worse online experience ever...

I've placed in an order, for the first time at Zando late November, and received an email confirming that my order has been dispatched on the 6th of December 2019. I haven't received it till now, even though they'd promised 5-7 days delivery on any order.

This is unacceptable, as I've used my work physical address for delivery and closing tomorrow. What is worse, is that they are not answering not responding to any calls and emails. I called yesterday, and the phone rang for more than 20minutes, thereafter a lady told me that their lines are down and unable to trace my order. She took my order number. *** and promised to call yesterday. I am still waiting. I called today and no one cared to answer.

What is going on???????? Worse online experience ever...