Stovetop burning splashback

Hi everyone,

Recently had my kitchen redone including new appliances, splash back and a pantry. During the construction everything was done through a company and all measurements were taken etc with a plan created to renovate.

However, a week after using the kitchen we have noticed the splash-back was being discoloured by the stove top (heat from burner) so we put up a heat shield temporarily from Amazon.

The stove has still burnt through, and it’s gotten worse, as attached in the photos. The burner only has 5cm of clearance from the wall. The splash-back was installed by a contractor supplied by the company.

Do we have any recourse here as overtime it will continue to just get worse.