Burying cable line

On September 26 a Comcast technician repaired the cable line to our home, and said the line would be buried in about 2 weeks.  I then received an email from Comcast telling me the same thing.  It is now October 16 and the line has not yet been buried.  Utility flags were placed about 10 days ago, so the line is ready to be buried.  Today I went to the local Comcast store and asked when the cable would be buried.  The store representatives I spoke with (Katie and Stephen) checked the status on my account, and told me no assignment had yet been made to bury the cable line.  They set me up for November 15, which they said was the first available date.  I explained that having the line unburied that long could likely result in the line being cut by the nieghborhood's landscape company.  I asked that the cable be bruied earilier than November 15 , since that would be 7 weeks from the first request.   The line only needed to be replaced last time because Comcast had only buried it less than 1 inch below the surface, and it had been cut when our landscape company aerated that part of our lawn.  HELP!!!!