We would have hoped for better service than you have received, especially as you have only owned the car since April. If you have not done so already, we would suggest writing a letter of complaint to Citroen UK by recorded post, explaining the situation and outlining your dissatisfaction with the response, especially as it has been acknowledged that this is a known fault.

If this is unsuccessful you could try to reject the vehicle on the grounds that it is not of sufficient quality. Although you have owned the vehicle for seven months, which is outside the initial six months where your rights are at their strongest, you have up to 12 months to reject the vehicle. We would think it is reasonable to expect a four year old vehicle to last for more than seven months before experiencing a significant mechanical issue. You can read more about this process here: www.honestjohn.co.uk/how-to-reject-a-car-your-cons.../