xfinity support

We have a line that was cut early summer by AT&T when they were running fiber optic.  After several contacts with you we were told it needs to be buried by the construction crew.  Advised them it is a trip hazard for the kids.  In the way of lawn mowing as well.  To date - nothing has been done.  With winter coming and sledding in the backyard the line could likely be cut by sled runners.  This is the line that serves the rest of street so will be unhappy customers.  We are not the only yard in the neighborhood that had a line cut.

How do we get this DONE?!