Woolworths online not delivering

I ordered some Christmas gifts for my family on the 12th of December. Woolworths gave an estimated delivery on the 18th of December. I did not receive anything. Online my ordered showed delivered. I immediately emailed and called them. They assured me that my order bas not been delivered and will be delivered the very next day. Till date no delivery. Calling them and emailing them has also reached a dead end. No one can assist meaningfully.