No response in the cancelation of my policy

I have been struggling to cancel this policy. I phoned on the 28th of September to cancel this policy I have REF# for the call was ***8. The person told me that the last debit date will be the month of OCTOBER and that someone will phone me within a couple of days (after the 28 of September). Till today no one has phoned or come back to me regarding this policy. I phoned again on the 15th of November to hear about any progress and was none. the lady said that someone will call me back the next day but no one did the REF# for that call was***6. As expected the following day 16th November no one phoned back so i phoned again to enquire about this issue and the lady said someone will phone back the next day the REF# for that call was ***7. As expected the 17th of November no one phoned back I called again and the lady on the other end said she will make sure Sipho phones me back before 17:30 REF# for that call was ***5. Never got a call back from Sipho. I am just afraid that they don't cancel this policy and bill me for months more as I see other people are struggling to cancel this.