black listing with out my consent

On the 17 august 2015 I received an error on my phone MM6 SOS ,the phone had power so took it to Vodacom telepage in port shepstone&they didn't know what was wrong so she sent it to jhb waited 2 weeks ,fault water damage- cost R3000 to repair I didn't agree got a 2nd opinion n google the error appears if blacklisted. Call the call center no joy,advised I should go to vodacom store,a lady confirmed blacklisted she was helpful to advise wat I need to do. On the form it says it takes 24 hour to action, fax on monday 05-10-2015 at 6.53am called 082111 to follow up as stated on form no joy .called on 07-10-2015 spoke to a rude Ntombi (cpt) she said \can't help me"then asked a thousand Questions to confirm it was me aske to speak to sum1 else then spoke to Sihle said he would try n help by mailing the department wonder if I would get any joy 2m . This is ***** how can they blacklist with out my consent """