Disappointing service from Vodacom

I am deeply disappointed and saddened by the clumsy way two Vodacom employees handled my request to cancel two of my wifi subscriptions. Instead of processing my request, they kept trying to convince me to continue with the subscriptions. As a result, the cancellations were not effected. Whenever I try to phone cancellations number, the voicemail claims that they have a huge number of calls. The facility gave me an option to leave my number so that they call back. They didn't call back.