Vodafone Billing Error Despite Cleared Payments

Despite paying all my bills and having no cancellation fees, Vodafone sent me an erroneous bill after completing the transition process. I verified myself and confirmed with the Vodafone dealer that there were no cancellation fees before the transition. I paid all my bills before transferring my number and confirmed there were no outstanding balances. Additionally, despite emailing Vodafone multiple times and attempting to call, the incorrect bill has yet to be rectified. My efforts to reach Vodafone for months have been futile, and I am facing significant distress. This has been an extremely negative customer experience for me. I demand Vodafone to promptly remove the incorrect bill and take appropriate action.