Poor service and rude agent

I've been calling Vodacom insurance call centre since November up until today no help at all. My phone screen is broken and this insurance refused to fix it I had to contact them to get this information no one bother to call me and inform me . Then I called on the 29/11 spoke to Lee I asked him to email me the letter that they won't fix my phone he dropped my called ever since my calls have been dropped until today I spoke to Penny the most rude agent I ever spoke to in my life who refused to transfer me to her manager but kept me on hold for almost an hour then she transferred me to Lee who then dropped my call again . Who must I call then ? Please hello Peter help us to expose this company that only knows to debit my bank account.