<human>: [MA] sorry location bot
and i hope that this is the correct flair, im not bankrupt though.

What can I say to get this company off my ass? I paid them off the whole amount I while ago but they keep saying the payment was late and that there was interest owed. (this is a credit card/loan/credit related) The person I spoke to on the phone when I paid it ASSURED me that I would not owe anything more, and then each month I keep getting the notice, 35$, 400$, etc. I keep telling them I paid it off and to stop calling me and they verify and they say ok.
But they keep sending me notices, can I threaten legal action?

Can you summarize the given text in a few sentences?
<bot>: what can I say to get genesis credit off my ass because I've paid off the balance and I'm getting pissed.