Vodacom's Online Returns Policy is appalling!

So I made a mistake - I accidentally upgraded my contract with the wrong phone via Vodacom's online service. It will now take 7-14 days for Vodacom to collect the phone which I cannot use, yet my upgrade is effective immediately. There is apparently no other way for me to deliver the phone to you or expedite the return process simply because I did this online myself. Why am I being punished for using your \convenient"self service function which helps you be more efficient and reduce the burden on your staff compliment in your stores and your call center? When I called in to ask what to do yesterday"