'너가 너무 바쁜척 했잖아, 연락을 해도 받지도 않고' => 네가 너무 바쁜 척했잖아. 연락을 해도 받지도 않고 (correct way to write it) 바쁜 척했잖아 = 바쁜 척하다 (act like you're busy/have no time) + -ㅆ잖아(you did, didn't you?). -잖아 is a contraction of -지 않아. -지 않아, like "is/does not", negates the phrase it attaches to. The contracted form -잖아 has a different sense, though. It is used as a rhetorical question, to confirm or emphasize the original meaning instead of negating it, similar to saying "Isn't this wonderful!" to mean "It is wonderful!" in English (the ending tone also changes from -지 않아). So 바쁜 척했잖아 means 바쁜 척했어, or "You acted to me as if you're too busy(to talk to me)". '사랑노래가 솔직히 돈이 되잖아요...' => Frankly, love songs make money (it's love songs that bring in money). - 솔직히 = honestly, frankly. It's often used to mean "to say it bluntly" as in this example. - 돈이 되다 = translates to money; bring in money. - 돈이 되잖아요 = same as 돈이 돼요, but said in a question-like form to make it sharper, as explained above.