Rain Bad service and enrichment

June 2023 I contacted Rain to change my package from R739 to R549. They advised me that it is done only to be charged R622.87 in August 2023. They continue to charge me incorrectly from September charging me R739 until November 2023. All these months I have been calling and complaining nothing was done about this . I requested Rain on the 26 October 2023 to cancel their service with immediate effect they agree but still continued to debit me. They promised to reimburse me for debiting me incorrectly as the mistake was on their side none of that happened. They decided again to debit me today with R302.84 for what good reason I dont know. My last call to rain was on the 21 November 2023 and they left me on hold for 1hr 32 minutes because I asked for a supervisor.