power seats it will not puff up motor just hum sound what

my car seats use to be able to set the cushin with the touch of a botton now the motor has stop working and I want to take a long trip but I can not fix my cushin seat seat any more. that was one of the good things bout this car I still got the car have had it going ten years it still a good riding car it just my seats the motor has stop working so whats the cost for that to be replace so I can get it back that's all thanks if not it cool I would like to have it back