Not allowing dealer to pay off my account

I'm so furious and frustrated at the same time by the Consultant from Nimble by the name Debbie.

My JD account was handed over to them and I'm paying the account every month without a fail but now there is a dealer that wants to payoff my account with Nimble so that I can get a settlement letter and this consultant is disputing that. Why so? It is within my rights to pay off that account and get off with them..

Now what they are doing they act as if they are the Debt riview company of which they are not. What I need from them is yo give a go ahead to this dealer to pay ofg my account and give them the settlement letter and get done with it.

I don't know what Debbie's problem is because I'm stuck because of her selfishness.