Damage to car after windscreen replaced

<p>I had my windscreen replaced a few weeks ago by PG Glass.</p> <p>Two days or so after I noticed a mark on my A pillar with a grey or silver marker around 8cm in length.<br />I received an SMS for rating their service upon which I responded to and explained the reason.</p> <p><br />A few days ago I eventually received a call from someone named "Precious" who called to follow up on the low rating.<br />Upon explaining to her that damage was done to my car, she said that she would have to speak to her manager and I never received any further feedback.</p> <p> </p> <p>I cannot understand how your technicians just make marks on a vehicle and think it ok to leave it as such.<br />I want to know what action PG Glass is going to take - I want my car restored!</p>