Affected my ITC

I called in to Vodacome to cancel my contract in March 2024 the consultant never cancelled the contract and now that I am trying to apply for finance on a vehicle I am being told that I have an outstanding account that is affecting my ITC have called Vodacom regarding the matter and I kept getting transferred to different departments when I got hold of a consultant they said I owe them over R10 000 I have not even used any of their services since January 2024 when I asked them why was the policy not cancelled I was told it’s showing as a pending cancellation the reason I cancel with them in the first place was due to bad service with their fiber they would debit my account and for most of the month I would not have any fiber connection I had to book a technician every month they are really the worst when it comes to customer service I would not recommend them. For a company that is as big as they are they really lack in customer service. I am having a hard time removing them from my ITC I really don’t know what to do anymore I feel like I have been ****** as a customer.