Blacklisting Devices is Impossible

Had a bad experience a week ago when my phone and Samsung tablets were ******, All I have wanted to do is Blacklist these Devices. I went on Tuesday 18th Aug 2015 to blacklist my phone and Samsung devices at Norwood mall, I waited over an hour and eventually they assured me that the devices were blacklisted. I then called to confirm what had been done in Norwood and I was on hold for over 30 minutes, I was then informed that what was captured at the store was not reflected in the system. Then I had to recapture the details again with REF number *** and was told that I will receive a confirmation call within 24HRS and sms with the progress and ref no . I called Cell C again today as i had not received an sms or a call! - Thursday the 19Aug 2015 and had to wait another 30 minutes to take my call ,gave the REF no.after another 20 minute conversation ( 50 Minutes in total)they said the Ref no was logged incorrectly and the devices have NOT been blacklisted. So this is the second this has happened and its one week later after the incident! I now have a new REF no. ***<br> <br> What is the chance of Cell C getting it right this time!