I have 7 children and millions of fleas, how do i get them out(the fleas that is)?

when i first noticed the problem i went out and bought bombs(foggers) and to my dismay it had not workedso the next day i repeated being sure to follow directions thoroughly. i vacuum three times daily everywhere. i have also hired professional and followed his advice of alkaseltzer in pie pans under lamp, this all after professional spraying. the fleas keep coming back, my poor children are about to go back to school and are covered in flea bites. ive read all of the other responses and believe me i have tried them all the fleas wont go away please help i dont know what else to do.