Pathetic customer care

I had trying to do an upgrade through the retensions department from the 2 december 2019.I had to call on numerous occasions as i was not been given feedback on my query i spoke to consultants and managers that all werent able to assist or follow through on promises eventually on the 3 a consultant called and did the upgrade he said that the confirmations department will contact me the next day to confirm the order and then it will be delivered i am stilling waiting for a call from them, I tried to query the status but now im being told that my call volume to the call centre is too high and they have blocked my number what nonsense is that? I need to follow up on my upgrade and now there is no platform i can use Vodacom is the worst when it comes to customers service!!!