Zando - no service

I placed and paid for an Order 7 days ago and have been trying to get hold of the Call Center via the 086 number as well as the email addresses provided under Contact Us on their website. After numerous email attempts, a tweet on Twitter and many phonecalls which just ring without any answer, I have been left utterly frustrated. There seems to be no way for me to get hold of anyone to follow up on my order that was supposed to be delivered last week. The app also doesn't allow me to cancel the order at this stage, so I can only pray that someone will respond to this complaint so I can finally get resolution on this matter.

I honestly have no idea what other methods to try :( It's been the worst online experience I've ever had, and certainly wont be buying from Zando in future.