Hidden cost

I bought H1 Hyundai from autopedigree mafikeng branch.the sales person was evasive and all the costs and always referred me to the manager and who also avoided disclosing all the costs.they did not issue me a copy of the contract which I had to call the financier(Mfc Nedbank)to my suprise I had being charged extra fees which I enquirer at their head office,was not supposed to be charged. This week on Monday I called head office again about this matter they said to me I should arrange a lawyer to solve this.