Next day.. Fail!

I did a new Contract Upgrade (Data Sim only) online on Thursday 10 December. The website tells you that you can expect next day delivery, and I spoke to a very helpful consultant who promised next day delivery. I received an sms at 8:19am on Thursday saying that my application was approved. I then spent the entire day at home Friday waiting anxiously for a delivery! Well, it is now Sunday the 13th - 3 DAYS later... still no sign of my sim card - no delivery - not even a phone call saying when I can expect delivery. This has become a serious inconvenience. I could have gotten my sim card from a shop by now. I tried to inquire with one of your consultants several times, but then just got transferred back and forth by people who couldn't help, and told I am only due for an upgrade in 2017, which obviously means my recent request has been processed, as my current contract is up.