Cool Ideas shocking trying to double bill!!!!

I contacted cool ideas to to upgrade our data line and this was done! At the end of that month I paid pro rata the difference for upgraded line for the period of month and new month. This month I received two charges for same data line. Old line charge and new charge! I Created a ticket in Cool Zone High Priority yesterday. No courtesy of any response whatsoever. Cool ideas have obviously been caught out at trying to double bill!! But no response not acceptable!!!