Just trying to upgrade but Vodacom not interested

I am fedup with Vodacom's service. Nothing seems to work. I tried to phone the Call Centre - it is unavailable. I tried to chat online - nobody responds. I tried to email them - no reaction. I tried to upgrade my contract online - still nothing after 2 month's trying. I am disgusted at Vodacom's pathetic service. Wish the @#$% CEO can phone me so that I can tell him how inefficient his company's customer service is. I have been a Vodacom customer for almost 30 years now, but never experienced this pathetic service levels before.