RCS IS RIPPING ME OFF

I had an account with RCS, and during Lockdown in 2020, I was hit by retrenchment. I app**** for credit life RCS because to unemployment and was denied, despite the fact that I was paying the insurance. Despite my helplessness, I continued to make little payments. MBD was entrusted with collecting the account. In March 2022, I paid the account and completed it. I've been harassed by another credit collector who was attempting to collect the money. I'm at a loss for what to do; it's exhausting and frustrating. Why do I have to keep paying this account? RCS has given multiple credit collectors instructions to take money from me. Please help me get out of this bright light *******. Can RCS reconcile their books and leave me in peace.