Absa Vehicle and Asset Finanace - FastBuy dont use it

I have been trying to sell my car via ABSA's FastBuy system as they recommend it to make a saving on the shortfall.

The FastBuy team has zero customer service, have been spent hours on the phone calling and trying to get feedback. I get promised feedback by managers who then go on leave and I am left with no alternative but to wait. In the meantime absa will debit my account at month end.