Ignoring instructions

My cell number was due for upgrade on the 3 October 2017. I've done it over the internet and message said they will phone me to confirm. 2 days later I've phoned and I was told that I got a new contract and it was on its way . Their internet option isn't working like it should and I can not cancel I must decline with couriers. Fine so we did it. I upgraded with vodacom over the phone and told the consultant that my phone can only be delivered after 2 because I am not at home before then - it is very difficult to enter my work premises. From Monday till Wednesday they keep coming in the mornings 11:00-13:00 . I was once phoned to be informed that they are there.Now my phone has been sent back on Thursday I can not upgrade because it must be cancelled - 4 days ???? . Don't give people the option to upgrade over the internet / phone if website is faulty and couriers can't communicate or follow instructions.