Unfair Practice by Wesbank

Disappointed by Wesbank I have a Vehicle Finance Contract with them and I was behind payment of which I made an arrangement with them to male payment of I was honoring it but to my surprise the vehicle was repossessed from me and it's been 3 weeks now been trying to contact them to make arrangements to settle the vehicle in full but they keep saying we will call you back or email you I have heard nothing from them now got a shock of my life when they say the car is going om auction for half the amount owed while I still offered to settle the balance now if its auctioned at half amount and I still have to be liable for the short fall I feel this is unfair practice