Get rid of the pads and train them properly all you're doing is confusing them.
Never scold, correct, get rid of that trainer you should be able to train them yourself if you do it properly.
Of course the first thing you did wrong was to get two pups so close together in age, which makes training very difficult.
Should have gotten just one and trained that one first and then and only then consider getting another.
As you've already discovered, sprays don't work.
Training requires a lot of patience, constant supervision, separate/contain only when you can't supervise, immediate correction when caught in the act, consistency, diligence, time, minimum 6-18 months, more or less, if done properly, to start, on your part.
http://i40.photobucket.com/albums/e224/GLLNTKNIGHT/pottyjpg1_zps0bd4f0ba.jpg
Proper feeding may help determine elimination times.
http://i40.photobucket.com/albums/e224/GLLNTKNIGHT/feeding_zps90a9666f.jpg
You must provide sufficient daily exercise/elimination times, regardless of weather conditions, how you maybe feeling (tired/sick/busy), and other obligations such as school, homework, extracurricular activities, household chores, childcare, work and social life. An empty/tired dog is a good dog.
http://i40.photobucket.com/albums/e224/GLLNTKNIGHT/exercise1_zpsfb9dd351.jpg
Clean all soiled areas properly by first removing all solids/liquids then:
http://i40.photobucket.com/albums/e224/GLLNTKNIGHT/carpeturine_zps07ea7542.jpg
Once trained you must still enforce what was trained on the daily basis for the life of the dogs, 12-17 years.
Good luck you've got a long road ahead of you.
Happy New Year.