Vodacom Customer service does not exist

I have been a client of Vodacom for 21 years and I have never been more disappointed with their service than my recent experience.... I have an existing data contract with Vodacom (10Gig normal + 10 Gig night owl) - during the course of February month, I was billed out of bundle rates with an explanation that my data was used up before month end. Upon closer analysis of the itemized bill, I picked up that a significant amount of night owl transactions was counted as normal data (30%). I tried to relay this finding back to the Vodacom call center (Annelisa Rweqana - Team Lead) and eventually to their back office (Dyllan Canterbury) but I have still not received a response, this is a month since I initiated the first query. I have loaded multiple queries and have spoken to numerous call center agents (Nomsa, Palesa, Keya, Lesego) but none have been able to/or want to assist. Both Annelisa and Dyllan have ignored my requests for feedback. My queries are being closed off as complete even though they have not closed the loop with the client...... if Vodacom values customers, this should be a given.

Message to Vodacom: You are dismally failing at keeping customers satisfied, especially ones that have been loyal for this many years. I will have no choice but to terminate my contracts.