Horrible Service

I've SETTLED my Edgars account 2 months ago. I have sent them AND RCS the proof of payment multiple times per email but still get a statement every month. I keep phoning them, mailing them( as they tell me to when I phone them), and even went into the store several times, although they can apparently not assist. According to my statement, I'm now in arrears. This has influenced my perfect credit score tromendously. It's unacceptable. They keep referring me to RCS whom I also tried to phone, email etc. But still nothing.