Unit 21 something is wrong with my bill

Woman:well,we didn't ask for this room service maybe someone else ask it ,I'm sure.

Man:Oh,is it? let me check.

Woman:yes,please.

Man:I'm sorry to say this room charge is yours.

Woman:We payed for the room service already in our room,

Man:Do you have any evidences?

Woman:No,we got know we see it and pay it on the spot!