someone says....? someone says: we weren't able to locate an account ith that number, please enter your ____ number and press count.

the part where i made '____' is a word that i cant understand, its a word that kinda rhymes with 'pendengent', or 'cendengent', it has a 'dengent' part in the last part...help me, tell me what the word is and what does it mean + tell me what i'm supposed to do