Shame on you Vodacom

Dear Vodacom , Not sure who advised you to change my statement information on my account ( Address and billing information) - to have this now changed back is a real challenge due to Vodacom's staff's incompetency, clearly you did this based on my delivery address (work) I supp**** to you on my last upgrades . So my invoices show one address and my statement shows another. I called your call center in mid- September to have this rectified , only to be told that this can only be done at a branch . I then go into a branch and supply all necessary information - I am advised that the next statement would be in order, I then wait for the next statement and guess what ? NOTHING HAS CHANGED !!! Thanks for impeccable service I have been more than 20 years with you . What should I do now ? Go back to a branch ?