Vodacom *****

My cellphone contract runs till November this year. Suddenly my latest invoice says we changed to a RED package with additional costs. No idea what this package is, nobody contacted us regarding this. On checking, we’re told we have to send a affidavit signed by 3 people, plus ID, etc to the ***** department. My question is this: we did nothing to change our package, but now we have to prove that we didn’t request this! We’re retired, live on a farm, don’t have a printer, so this is a mission for us! Maybe they count on people just letting it go and paying the extra? Their branch where we do our contracts checked and say they can see that we never received a call on 16th, the date they say this happened.