Comedy of errors

Vodacom has made firstly cancelling and then upgrading a mission and an unpleasant experience. 1. No debit order was raised for June 2021 and it seems like I have been penalised. I discovered this when I attempted to upgrade/cancel. 2. Called to cancel, agent convinced me to upgrade. The agent then selected the incorrect contract and the upgrade had to be cancelled. 3. Called in again today and almost upgraded again. However, only 36 month contracts available to me. Also the phone (Xiaomi Redmi Note 9 Pro) I am interested in is not available to me. The reason given to me was that my credit profile with Vodacom is not good. I check my actual credit profile monthly and it has been always been good (600+). There are various reference numbers that have been logged in the last month. I am really at my wits end with Vodacom now and I am seriously considering changing my cellphone contract provider.