Worst service

We bought a couch and a ****gy rug. After confirming with coricraft for delivery on the 18th of December. The delivery company tried to phone us on the 17th to confirm (even though we have already confirmed).we had missed the call. And tried to phone them back 12 times over the 17th and 18th Dec. Upon the 13th attempt we got through, only for the manager to tell us we can only deliver on the 21st??!!! When telling the manager we tried to phone 13 times, response of manager,\OK". We had arranged time off work for the 18th. We were fuming. Then once they delivered on the 21st"