Can't keep there promises because they can't follow instructions

I currently have 3 contracts with Vodacom. The one recently expired and I decided to upgrade online. I started this process on 04/11/2018 Filled in everything. I took note of the fact that delivery will be 1 day in main centers. I also made sure that my contact details where correct and set to my main contract. I received a note on my e-mail that a call center agent will contact me and confirm my order within 24 hours, and if not I should call them. Of course a day later nobody called and I called the number as instructed. Was then quickly assisted. Said they will send me a confirmation or a another call for final confirmation. For two days nothing received. Again I called the call center only to get the answer that they did call, but nobody answered. I Asked to which number they were calling and they gave my 076 number which I told them is at home and never manned and once again instructed them to call me to my main number. Said they will put the note on the system. So eventually another day later they called the correct number. Delivery was confirmed for today 11/06/2018. Said the courier will call and confirm delivery. So once again did not receive any correspondence regarding this. I called the call center to confirm if they are still delivering and the stated that it went to the courier and the courier tried contacting me, but could not get any answer. Once again asked what number they used and they said the 076 number. At this stage I got very crossed, because they ignored my instruction for 3x times to call me to my main number. They then said delivery will now only be tomorrow. If they followed the instruction correctly delivery should have been well before the weekend. So Much for a 1 day delivery promise.