Proof Of Contract

I am appalled by Vodacom, I've been a contract holder for 7years if not more. I took out a contract 7+ years ago at their Sunnyside branch, today 28/07/2015 I go to \Voda World"to ask for a proof of contact as I have misplaced my proof of purchase and I was bluntly told to go back to where I took out the contract. This coming from what I would regard as \""the head-office\"" or rather the \""main vodacom branch\"".. . I have been with vodacom for more than 10yrs and after today's frustration I seriously can't wait for my contract to expire """