Harassment by the Credit solutions Company.

I was handed over to nimble credit solutions by tracker after some issues, I eventually paid off my account and requested closure, duly so on the 27th of July 2024 I received an email confirming the ticket closure, after I complained about notices of debt on the tracker account of which by then I had already paid it off

Now of late I am being flooded with notices of demand for the same account ... This is really unfair and a harassment.