The impossible contract to get out of.

The impossible contract to get out of.I signed a 2 year contract with vodacom in 2018 it was suppose to end in July 2020.I called every month after July to cancel the contract but they still wont stop debiting.I have spoken with many consultants about this and they all kept lying to me saying the contaract has been cancelled.I spoke to Nompilo,Trevon and Elvina and the rudest of them all Sandra,She even hung up on me,when have you ever heard of a call centre consultant hanging up a phone on you?And on top of that I found out that Im on arrears,how? because I have pleading for this contract to be cancelled for months now.