You got it ALL wrong, mate.
Conjugation of (으)세요 —
•Verb stem + 으세요 (If the VS ends in a consonant)
천천히 먹으세요 = Eat slowly
편하게 앉으세요 = Sit comfortably
•Verb stem + 세요 (If the VS ends in a vowel)
방아쇠를 당기세요 = Pull the trigger
이 약을 복용하세요 = Take this medicine.