phone recording program for osx

i want a program to record phone calls through the computers modem
my cable company is screwing me around and everyone gives me differnt answers so i want to record the calls
i dont mind giving the whole "this call is being monitored for quality assurance purposes" disclaimer.
i hear for my province you only need to warn them for it to be alright to record for personal use
plus im sure having something like that is handy to have if needed

thanks for the help