Poor customer relations Hyundai Boksburg

Good day. Just wanted to get advise on the bad service I have received from Hyundai Boksburg, pre sales consultant Jaco. I am looking at getting advise on options to take to get Hyundai Boksburg to forcefully execute their obligation to the contract. Bought a car in June. It has been such a headache from getting tracker fitted, inspection of the car and now after 4 months of my car being bought, I still have no registration. The delay now is the spare keys that had to be fixed upon purchase of the car. About a month ago, Jaco apologized about all the headaches and asked for pictures of the current key to make copies. Till today nothing has been done. On Thursday, he contacted me on whatsapp saying their are keys he is coming to try out on my vehicle, till today he has not come. I even contacted JP the manager and the financial manager, even followed up on my email, till date I have not heard nothing. Now I need legal channels to take this matter up at Hyundai Head Office. How do I do this.