Vodacom staff blacklisted my device by accident, and now having issues getting it reversed.

My phone was ****** and had to get a sim-swop done. I've done this on Sunday 15/07/18 at Vodacom ****arney, JHB. The sales lady that did it forgot to inform me not to insert the new sim into the phone within 4 hours. I was told the card would be activated within 24hours. On Monday the sim had not yet been activated. As I'm a student I only had limited time to go into a Vodacom shop to fix the issue. I've informed them on Monday that it's not active yet, which led them to give me another sim card seeing I've inserted the previous one too early into my phone. By the afternoon when I inserted the new card, it still wasn't activated. I went back to the Vodashop (****arney) to try and get it fixed. By Tuesday morning the problem wasn't solved. I went back yet again! The lady then accidentally black-listed my new device, which she immediately reversed and apologized for. By 17:30 my phone finally was working, but only till early after 18:00. It then said "no service". I went to Vodashop in Craighall Park (as it's on my way to class), where I was told my device is blacklisted and that the sim is working fine. During my lunch break I went back to Vodashop ****arney to inform them that my phone is blacklisted and that it is not working. I've filled in a form to unblacklist it and was told by Thursday morning (19/07/18) it should be fine. As I can't make any calls, I've received an email address to where I can inform them if the phone is working or not, which I did this morning (19/07/18). I have now been without a network service from Vodacom, which I am paying for since Sunday! I hold them solely responsible for blacklisting my phone, which they clearly don't care to resolve soon even if it was THEIR mistake. The level of service so far is appalling! (I will give credit to the lady though, as she was trying to resolve the matter but can only do so much).