Bad customer service

I bought a phone insurance from Vodacom Hatfield on 12/12/2019 for R35.00 and to surprise R67. 74 was deducted from my account. When I asked the same person who sold me the phone and insurance, she told me to contact the insurance myself. I called *** many times but only to find that they do not answer or care about the calling this number. For now what I need from this experience is to canceled this insurance as it shows that I will encounter problems if I were to claim because they are not answering my calls.