TXU Energy Retail

WE had service with TXU since 01/2015 and its been pretty normal billing, between 05/15 $74.06 we did not live in the house from May to July 2015 (kwh 71) 06/15 $31.51 (kwh 67) 07/15 $42.96 (kwh 167) 08/15 $305.94 (kwh 2340) 09/15 $388.97 (kwh 2724 ) 10/15 $250.32 (kwh 1904 ) 11/15 $205.60 (kwh 1168) 12/15 $301.03 (kwh 1789) 01/16 $ 717.43 (kwh 4393) until the month of January 2016 shocker when we ware not even using the A/C or Heater we used the fireplace and we have a gas dryer. What all's can I do to ? or were can I go to complain and summit a audit on this issue? I will most definitely not live it like this.