Vodacom is not helpful at all

On the 26th of March 2020. I went to vodacom at Mall of africa. A lady helped me and and i paid my last outstanding fee. I asked if i can cancel my contract. She said i have to call vodacom for cancellations. Since 27 March 2020 I've been trying to contact vodacom help line to cancel my contract yet NO HELP at all. Vodacom phones this whole week telling me that I have an outstanding few for the month of April 2020. Once again I asked to cancel my account due to the last payment that was made in 26 March 2020.contract ended 30 March 2020. Vodacom help like center is pathetic. They keep putting me through to a different teller everytime yet nothing happens. I personally want to vodacom once again on the 13 May 2020. They told me the same story that I have to call in to cancel contract

In the