Poor service from Liquid Capital

I feel I am not getting proper help from Hyundai Boksburg/liquid Capital. The purchase price was at R573k then we agreed that I`ll pay the service and license fees upfront so that the price would be reduced to R567k. This was done around 29th Oct 18. Then Hyundai decided to forward R573k instead of R567k to Wesbank which is wrong as it affect the premium , balloon payment & me. Its 2 weeks since query sent to Boksburg but no help. So why the poor service & how can I be helped in this regard?