Vodacom, incorrect information

On the 10 April 2018 the end date of my cell is 2 July 2018. Now today 20 April 2018 my contract end date show 17 April 2020. On 10 April 2018, I check again and my contract plan show Smart S, now 20 April 2018 my contract plan show Top up Collections. I never migrate or did an upgrade, as I request to cancel contract. I have the emails to verify that I did request cancellation.

I was told to speak to the billing department during office hours. They are only interested that my account is in arrears. Why then change the upgrade date and contract plan. Last time when I also place complaint on Hello Peter, I was called the following day at the office. Do we (I) have to go to this extreme for someone to listen. I am not interested in excuses, just fix the damn mistakes that Vodacom did.