Vodacom cant/wont honour their upgrade offering

Good Day, I am writing to address a recent issue I encountered regarding my upgrade of my cell contract with Vodacom's Upgrade Department. Following a discussion regarding my requirements, an agreement was reached on the terms and conditions, including an agreed-upon amount and the specifications of the products to be provided. Subsequently, RAM couriers contacted me via WhatsApp as per process. However, subsequent to this, I experienced a lack of communication from RAM couriers, prompting me to follow up where I was told to contact Vodacom directly as they had no news on the delivery. following contact with Vodacom and to my disappointment, I was informed that there had been a misunderstanding, and that Vodacom was unable to honor the previously agreed-upon terms as was discussed and agreed in the recorded call with the Vodacom agent. In light of this situation, I must express my dissatisfaction with the handling of the matter. As a longstanding and loyal customer of Vodacom, I believe you guys have made a mess of this and I will not let this go until its been resolved. Therefore, I kindly request access to the voice recordings of the conversations in question so we can take this matter forward and conclude. I trust that Vodacom will take swift and appropriate action to rectify this situation and uphold the principles of fair and transparent business dealings. Your prompt attention to this matter would be greatly appreciated.