paying more than i owe

i paid this people long ago last year when they told me my account is no longer with them as i was paying 2 accounts, later i was sms telling me i owe the account that was taken away ,i emaile dthem documents as to be clear even now i didnt get a respond,according to my knowledge i have paid more account to this company that some i didnt know just cause i was paying under attorneys ,i will never and never again