Terrible service from Vodacom

My husbands phone was ****** last Friday night and when we called Vodacom they blacklisted my daughters phone instead. We filled in the form to unblacklist the phone the following morning. Vodacom advised us on Tuesday to turn off the device for 24 hours, which we did. It still wasn’t working 24 hours later. They advised us to switch it off 24 hours again. And it still isn’t working. They are now saying we must switch it off for another 24 hours. It’s completely unacceptable firstly because they blacklisted the wrong phone and it’s still not working even after having it off for 48 hours. We don’t know what to do!