Shocking vodacom!

I am at my wits end with vodacom!! Recently my partners phone went missing, presumed ****** we reported it and black listed the phone. Later that day it was returned by a person who found the phone. we went through the process of unblack listing the phone with vodacom and all the necessary paper work and procedures the phone came back online and started to work for 3 days after that it went back to no signal we went to the fourways vodacome store who informed us the phone is still black listed so we went through all the paper work again switching off the phone for 48hours, once more the phone was switched on and still not working we went back to the vodacom store in fourways to tell us it is apparently a software problem but they cant take the phone in because it is still registered as black listed. we have switched this phone off 4 times and filled in all paper work four times and still to no prevail is this phone working!!!!!! no one in vodacom can actually fix this and we get sent from person to person with each one saying they cant help us!!!! this is so unbelievable this is a contract phone and business phone!! R2000 contract!!!