Frustrated.... disgusting unethical customer service

Purchased a brand new car and within a year it has broken down Worst case is Nissan is not even helpful in providing me with a courtesy vehicle I've been without a vehicle for more than a week Every single day its a struggle to get around without a vehicle and the only thing good enough to them is that I need to wait

How on earth can Nissan be so disappointing in assisting when they such massive conmany