Account handed over

I had an account with ABIL and was handed over HTN Attorneys. They have been offering discounts and I responded to one of their emails asking them how much discount they can offer but they never responded. ABIL sent me an email and offered me a discount which I then took up immediately and I made the payment. I sent the paid up letter to HTN Attorneys and they confirmed to have received it. HTN is still sending me email of the same account I had settled in October and when I sent them an email they rep**** that the account is still active with them even though I settled it with ABIL as I was handed over to them.