Tuning adapters no longer working - all 3 flashing yellow

My 3 tuning adapters are have also stopped working.  Obviously a Cox network problem but typically their inept Customer 'Support' blames the user.  One would expect that since they are getting multiple calls for the same issue, they would realize that this is a network proble.  I guess to expect such alalysis being done by the Customer 'Support' group is wishful thinking.