Wesbank keep deteriorating

Wesbank has the worst internal communication ability of any finance house I have ever come across. I was busy negotiating a settlement amount on my vehicle with Oupa Makhuba when all of the sudden his comms with me ceased. I then received an email from HP Attorneys informing me that they have been mandated to finalise the matter. They accepted my offer via email confirming that their client, Wesbank, has accepted the settlement. I secured the finances and just when I wanted to settle Wesbank sent an email saying that the original amount was due. I called HP Attorneys who then told me that the account has been handed back to Wesbank because the matter was seen as complete. I have been trying to contact Oupa Makhubu at Wesbank but he ignores my attempts. I have requested that HP Attorneys send me proof of their mandate and proof of Wesbank accepting the offer but they also avoiding me. Other staff at Wesbank have been trying to assist but clearly their internal comms dont exist