Vodacom Won't Help Even Though They Said They Would

I spoke with Vodacom several weeks ago and was told I could buy a net extender from Vodacom and that Vodacom would help me with the settings. I have tried to come right but have had no luck, so tonight I phoned and spoke with Linda. The first time he sounded asleep and could not hear me, it seems. The second time I got through to his sleepy voice again and just hung up. He then phoned me, a little less sleepy this time, but unhelpul. He basically contradicted me when I told him what Vodacom had told me weeks earlier. If his colleague was wrong, then that is Vodacom's problem. Vodacom needs to honour what that person said. Linda was clearly not willing to help and I doubt he could by the way he sounded. Is Vodacom going to assist me or should I simply wait for a fibre competitor, which will be coming soon, and then change. This is not the kind of service I pay a lot of money for each month.