Can i please get a loan car and if they can't fix my car they must escalate this issue

I trust this email finds you well. I am writing to formally request your assistance regarding ongoing issues with my financed vehicle. For the past six months, I have experienced persistent “speed limit failure” problems with the car, which have not been resolved despite multiple visits to BMW dealerships. When the problem initially started, I took the vehicle to BMW Club Motors. However, the issue continued, and after contacting BMW South Africa to express my frustration, I was advised to take the vehicle to a different dealership. I then took the car to BMW Menlyn, where they replaced a component on the steering wheel. Unfortunately, the same problem reoccurred within two days after each collection. On 7 October, I returned the vehicle to BMW Menlyn as the error continued to appear frequently. Since then, my car has remained with them. I have not been provided with a loan vehicle, and although the dealership has arranged to drive me to and from work, this solution is not practical. Over weekends or when I need to run personal errands, I am forced to use Uber, which has become costly and inconvenient. Given the extended duration of the repairs and the ongoing inconvenience, I kindly request your urgent assistance in ensuring that I am provided with a loan vehicle while BMW works on resolving the issues with my car. Your support in this matter would be highly appreciated, and I look forward to your prompt response.