Vodacom will lose a loyal customer of 17 years

I am so furious with Vodacom for their poor and pathetic service. I have been trick into taking a contract and have been paying it sins December 2019. I contacted Vodacom early last year and brought it to their attention. They investigated it and found out that their consultant did indeed trick me into taking out the contract. I have been battling ever sins to get the issue resolved after having to make phone calls upon phone calls and had to speak to different consultants every time and explain the same story over and over. Every time they promised that some one will contact me but no one bothered to get back to me. They collected the device last year December and told me that they will reimburse me .I have been paying for the contract ever sins. Almost 3 weeks ago I had to phone them again and they put me to their after sales department. The lady said that they will phone me with in 7 days but no one phoned and i had to call them ones again. I asked the lady if her team leader could call me back the same day because i have been more than patient. Up to today 2 weeks later no one bother to call, mail or even send me a massage. I am with Vodacom for almost 17 years and never skipped a payment. So please tell me what do I do from here????????