Extreme poor service

From the 4th of Nov i battle to get my device for one of my contracts that i upgraded. Now and then, i follow up with them about my parcel. This morning when i try to follow up, a voice message saying. Your number is been blocked to avoid ********** activities. What the hell is this? I'm a client for many many years and is this the way you treat loyal clients. I want feedback and an apology from vodacom. Never give them a reason to doubt me, because i'm following up on poor service from their side.