Absa Vehicle Finance Terrible service

Absa Vehicle Fiannce has been really disappointing to deal with.

I am a Private Banker with Absa and had opted to purchase a new car in the middle of March. VAT increased on 1st Apri. After the dealer and myself completed all the relevant documentation by Wednesday, 28th March, including release note. Absa was instructed to release funds so to avoid the VAT increase however their staff failed to do so and the dealer has now sent me a revised invoice with about 4k additional because of VAT.

This is really disappointing and not fair on me to pay such, the dealer and myself made numerous phone calls with the promise that payment will be made. I have emails and telephonic communication of such. I am not willing to pay the extra amount and I am considering changing my bank due to this inefficient service from Absa.

If there is anyway this can be resolved I would appreciate that.