Ting Fiber installers tried to dig without line locating

I signed up for Ting Fiber in Colorado Springs since it's finally available at my house. My install date is not for a few weeks, but today some installers showed up to try to install and bury the cable from the box to my house. However, no one has called 811 yet to have the lines in my yard located and I haven't marked my sprinkler heads yet. From past installs, I know I have gas, electric and cable lines right in the area they will need to dig. I do not want them to hit my lines or get electrocuted.

Ting is supposed to have my lines located before digging, it's the law. I'm glad I knew about it and stopped them. They said they would get the lines located and come back afterwards, but I'm concerned that this could happen. I even emailed the construction email address asking them to let me know before they come so I could make sure I had my sprinkler heads marked.

I'm trying to contact Ting but so far no one is answering.