Bad customer experience by being double charged.

I wish to convey my dissatisfaction with Vodacom. On March 20, 2025, a representative addressed several issues I had previously reported, including unauthorized direct debits despite my cancellation in December 2023. I had unfairly paid direct debit charges in January 2024, and in February, I was incorrectly charged for advance airtime that I had already repaid. The representative assured me that I would no longer incur additional charges since I switched to cash payments, confirming my new installment amount of R688. However, I am now receiving notifications that my account is in arrears for the same amount I was double charged for. Vodacom has since issued a new invoice reflecting an increase to R749.61 due to the new VAT effective April 1, 2025. Despite my efforts to manage my account by purchasing R270 in airtime monthly, I continue to face ongoing issues. As I approach the final year of my contract, I find myself in a frustrating cycle of problems. While I am willing to pay the correct invoice amount of R749.91, I refuse to pay Vodacom for the airtime I consistently repay each month.