Disappointed in Dunlop

Owner did estimate and never once mention that gutters on metal roof had no warranty while on reg roof it had 25 year warranty. Next a snow retention was suggested and installed for an extra $490. Following spring snow retention all ripped off and screw holes all over my metal roof. Installer had screwed this contraction to metal only. No wood under. Just 4 inches higher there was a row of screws where metal roof was attached to wood. Dahhh!!! Owner called...all he wants to do is a butch up job. Put silicon in holes ..daaahh!!! No wood under....and screws on top...... no excuses whatsoever. No refund whatsoever either. Not a company you want to deal with !!!!