Pathetic customer care their error now my problem

At the beginning of March 2015 one morning my phone suddenly refused to dial out giving me an error code and allowing emergency call only, I could not even contact the customer services line (which they cut you off when they do answer). <br> <br> I then visited the Cradle Stone Mall outlet where I initially took out the contract. I was advised that the error code indicates that the phone has been blacklisted so someone must have reported it ******. I was asked to submit various documents and a letter to state I did not blacklist it, which I did. Still no change to date. <br> <br> I was then advised by the store to go to the repair center and they will swop the phone. After a 1 hour drive and a hour and a half wait, I was casually advised the store gave me the wrong information, they cannot swop the phone, I must re submit the forms. <br> <br> I then again submitted the forms, to get an email one week later to be advised that the letter is not sufficient, I must submit an affidavit to prove I did not report the phone as ******. <br> <br> If only they were this diligent to block the phone and actually confirm before hand. This is the worst service provider I ever had to deal with. Their ERROR now my problem.