Ruining my credit

Last month I posted here on Hellopeter as you are not reporting my payments to ITC. I paid you in full and almost 3 months later I still have 6 missed payments on my report. I was called last month after my first post and a lady told me they would send me the paid-up letter and they will also send it to ITC. Still, my credit report shows the missed payments and arrears, and I have not received the paid-up letter. PLEASE SORT THIS OUT. And I don't want another call telling me it will be sent. You can contact me via email.