Pathetic service ... As usual

I bought a 1GB data bundle for my wireless router this morning, not knowing that I entered ONE digit incorrectly. Now, Vodacom is telling me that they cannot do anything about it. Vodacom cannot be serious. My own service provider cannot help me reverse my own transaction. They are expecting me to leave this 1GB data with a complete stranger and pay the bill for it. Also, they want me to contact this stranger and ask him/her to either transfer the data back or reimburse me for it. I would like to know if they think people first of all just have time to waste and secondly, do they really think that someone will make this arrangement with a total stranger? I am over the pathetic service of this network and would love nothing more than to cancel my contract with them.