PureFibre Installation damaged my water sprinkler system

Before the construction begins, I put makers to all my sprinkler heads to let construction workers know I have sprinkler system installed in my lawn but they pulled them out and threw them away. Now, I found my front lawn's sprinkler is not working any more and I can't find my sprinkler head near the construction spot. Telus only spray the grass seeds to the lose soil and put a metal plate at the middle of my lawn and leave the sprinkler ssytem not working. Would any one tell me where I can file the complaints?

Thansk,

Peter