Poor effort from Vodacom to address my complaint

Exactly two months ago, I listed my complaint on Hello Peter regarding Vodacom's poor customer service at the Blueroute mall. To date, I have not had a satisfactory response. They keep passing me from one person to another, promising me that they will get back to me. I wait a couple of days with no further response before I take my complaint to Twitter again, and the whole cycle starts again. I get the feeling they are just stalling, hoping that I will lose steam and forget how ****ed off I am about all of this. Vodacom ought to be ashamed for not responding appropriately to a dissatisfied customer. I feel that I have the right to challenge my contact because Vodacom has not delivered what they said they would in that contract during the time that I have had the contract - the service of reliable Wifi (beyond the usual intermittent interruptions in service). I would like to have this conversation in person with the store manager but have not been able to as Vodacom seems unable to keep their franchisees in check. Please can Vodacom take this feedback seriously and respond to my dissatisfaction meaningfully and sincerely.