vodacom gave me a blacklisted cell phone

i am a very unhappy client and i will write about this on every social network i know of<br> <br> vodacom gave me an upgrade cell phone Samsung s6 egde 32gb on the 21 December 2015 they did not test the cell phone in store because the sim card i had was a micro sim card and not a nenno sim card. i never used the cell phone so when i finally made me sim card a nenno sim card and put it in the cell phone the phoen gave me an error (not registered on network ) so i took irt back and they booked it for repair at the Sandton branch and they called me back saying its my main board that was the problem i need to pay r4000.00 to get it fixed so i told them i cant pay to fix a phone that was given to me in that state( broken) so they called me back and said my cell phone was black listed by vodacom for what reason i dont know. they made me fill in a un-blacklisting form and it will take 48 hours to un-blacklist and ques what its been 4 days and my phone still does not work. i dont know what to do but i know i cant pay a contract and i was given a broken phone. this is not right vodacom can get away with this