Stop this Attorneys from harassing me with their calls and messages.

I have a challenge with finchoice. They are collecting money from my account every month even after making arrangements with their Attorneys that I will settle the account. Their lawyers MBD are harassing me with messages and calls demanding that I make payments into their account whilst finchoice is also collecting money from my account monthly. I'm now confused because I can't be paying money to Attorneys whilst finchoice is collecting money from my account non stop.