Unattended complaints by MFC

I bought a car from a dealership (KIA). They completely misguided me as a new buyer. And I asked the relevant questions in order to gain knowledge but I still got blind folded into a trap. The financial administrator did not call me once to discuss the contracts which are signed online. The are documents I don’t even recall signing coming up because it’s electronic. I contacted the company immediately to let them know that I was unhappy With the vehicle and they brushed it off and said the deal is set. I contacted MFC to rectify and complain but they don’t get back to you, they don’t call to get further details about the complaints and most times they don’t get back to you at all. It’s a month later I’m stuck with the car I didn’t want which I’m overpriced for and nobody is doing anything about it. My consumer rights left the window