Settled and Paid up Account reflecting negatively on my credit profile 28 months later, and no one cares

In December 2018 I settled my RCS account and received a paid up letter. But every single month I still see RCS listed on my various credit profiles with an outstanding balance. So for 2 years 4 months I have written numerous times to RCS both on hello peter and directly, I have logged complaints via the credit orgs, and STILL this is reflected. I am honestly so gutvol of this organization. SURELY SOMEONE WITHIN RCS GIVES A DAMN!