NO HELP

Booked my device in for repairs on the 23rd of July Job no ***3 as i didnt have network access on the device but my sim worked on other devices. was advised it might be the sim card tray. Got an sms on 7 Aug advising device is ready , was told mother board was replaced along with the sim tray. Phone still wasnt working upon pick up, i was asked to leave it so it can be sent to head office. Got feedback that the device was blocked hence it was still not working( noone could advise how or why it was blocked) Booked it in again job no ***1 went to full in forms to have it unblocked and 48 hours later still not working. went to repairs centre, then was advised it was never blocked. Logged a complaint and feedback from there was that it was indeed blocked and i need to contact the blacklist dep which i did and just got feedback that the device was never blocked. Can vodacom sort this out i pay monthly without fail, it they cant get to the bottom of this then they must give me a new device cause at this point i am paying for NOTHING