The worst service ever!

I placed an order on the 26th Nov just after 10 am and was supposed to get it by 3pm that day. They called me on Sat and I told them I'm not at work as that was my work address. I got another call on Sunday and told them to redeliver on Monday. I called the call centre Monday morning as my order was now showing as delivered and I didn't get anything as I was advised I would get my order during the day. My order is now showing delivery between 6pm and 7pm and I won't be at work then. I tried calling again and I cannot get through to them and no one is replying to my emails. I need my parcel delivered today.