Upgrade problems With Vodacom

I'm for years with Vodacom Cellphone services no problems, but suddenly I struggle to upgrade. Went to the shop several times to upgrade, only to hear that I can upgrade but Vodacom system is not been up dated. Vodacom has to up date there system so that the consultant can proceed with the upgrade. We call Vodacom on ***,*** several times and they promise I only have to wait 2hours then the system will be updated. Yesterday by 16:00 when I speak to the consultant he promise me he will phone me any time after 8 so that I can go and upgrade. It is 10:17 and no one from Vodacom phone me. I phone them and now they block my number so I can't talk to a consultant to resolve this problem. The way how I feel now is to tell all the people how bad Vodacom is. At this stage I think to go to MTN, Cell C or Telkom. The services for clients will be much better. I need a answer asap