Poor Sales Service

I purchased a pre owned vehicle from Mc Carthy The Glen. Took ownership 24 July 2017. Then proceeded to take the vehicle in for it's 45000km service only to be told by Kia that the std service plan is cancelled reason the car had been written off in November 2016 and that Wesbank cancelled the policy. I then proceeded to contact Mc Carthy The Glen as I needed to resolve this issue. 4th September I logged the complaint I have received no communication on the resolution. The 5 Spetember at 9.30 I had to contact them for an update; they proceeded to tell me they had pulled the history report and no accidents of which I became frustrated and irritated. The sales manager then proceeded to tell me since I made the statement that the vehicle was written off I need to provide her with information who I spoke to at Kia Service company Liquid Captial. Words were exchanged and I was told that the customer is not always right. I hung up the phone and the sales manager proceeded to leave a voice message on my phone to tell me she will not assist me since I hung up the phone and I must proceed to contact the ombudsmen. I have since emailed and left the message for the dealer principal I have not received confirmation of my complaint via email or telephone. I then proceeded to contact Bidvest Motor regional manger no confirmation of receipt complaint. I had no choice to contact Wesbank to log the complaint I am awaiting their response as to how do we resolve this issue. I am a sales person and am reliant on my vehicle to do my job. I cannot use my vehicle as if the mileage exceeds the service interval requirement and this service plan issue gets resolved I could void the service plan. I am extremely frustrated to the lack of communication from Mc Carthy The Glen. I have no confidence in this matter.