Refuse to take a Faulty car after 3months of sale

I have recently bought VW POLO TSI 1.2 GP at Mc Carthy Toyota Mobeni in mid July 2017, Claude was the sales agent I dealt with. I had complaints with the car when I received it with a loose passenger seat and a non functional key ( I'm using the spare since day 1). I let this slide thinking I will sort it out as Travis (Sales manager) and Claude was made aware and they didn't bother getting back to me about it. [BAD SERVICE] Last week 13/09 which was almost 3months with the car there was a malfunction on the car. These errors occurred on the dash: Check Coolant Windshield wipers faulty Door lock on MFD ( MDF) These three alerts cause the INDICATORS, LIGHTS, HAZARD, WIPERS and INSIDE DOOR LOCK to not work. drove it to Barons VW N1 City and there was no Fault found on the system when computer box was checked, car was monitored and Monday got the car back a Tuesday after work did the same thing. Told Travis I want a replacement according to Consumer Protection Act section 56 (2) I am entitled to 1 as the car is within its 6 months of sale. He refused. Spoke to VW SA and they advised to lodge complaint with MOISA (motor ombudsman). Advised Travis about it and he told me to go ahead. Complaint was lodged and the bank is made aware of this too. I have been trying to get hold of the Principal Dealer as advised by my bank Dave White for a solution to this whole thing. I am now waiting his response via email as he could not be found on mobile and landline after numerous calls.

All I want is a replacement car or cancelling the contract with the bank and no cost. I have missed days work dealing with this and I will fill it too.