Upgrade Nightmare

<p>I upgraded my contract with Vodacom online, but realised at the end that I had picked the wrong phone (iphone 7 instead of 7 Plus). My mistake, I know. I immediately contacted Vodacom to inform them of my mishap and to request the upgrade to be cancelled. They confirmed the cancellation telephonically, but despite that, I still received 3 phone calls from RAM couriers to deliver my phone the following day. It has now been more than 2 weeks and my profile still states that my contract has already been upgraded despite me not signing any documents or receiving the phone. I have phoned the Vodacom online helpline on several occassions to no avail. How difficult can it be to reverse the upgrade??</p>