Disgusting customer support provided

On 22nd March I upgraded a contract with Vodacom, the sales lady was good and I had high hopes. I confirmed my contact details with her and gave her the correct number to call about 2 times. Also confirmed my new address twice. I had hopes as it seems she understood. Also confirmed that her manager will do the needed changes on the system with my new number. On 28th I get an email from Ram stating the delivery attempt failed and when contacting them they had the incorrect number. A number that was supposed to have been changed. I called in at about 1:30 and the 1st agent I think Thando or Thabo 1st my laughed at me when I spoke and when I asked him I was informed he was laughing at another customer. That call went south from there and when I asked to speak to a manager I was told she’s busy and will be transferred to the correct department. That call dropped. Second call in, Aisha answered, didn’t ask anything told me to hold and had me on the line for 5 min. I dropped and called back and finally spoke to Rachmat in the aftersales department. She assured me that my information was updated but it will only be changed tomorrow. A mistake or dare I say negligent behaviour from Vodacom has now caused me to waste my time on calls. Speaking to agents who don’t care about the client and then finally when I spoke to someone it was an apology and you need to wait. I’m disgusted with the service that I received up until I got to Rachmat who assisted to the best of her ability. A Tl refusing to speak to me, agents laughing at me and also agents keeping you on hold.