Capfin & nimble services. Your information is not safe. *****

I took a loan from capfin and due to life happening I defaulted in my payments and my account was handed over to nimble collection services and I received a number of phone calls and smses from nimble collection. I received a call from a lady in August instructing me to pay x amount of money to settle my account and which a week later I did pay that amount. Now I keep getting calls that I owe x amount to nimble which I do not understand. Now im being told that capfin may have handed my account to another collection service either than nimble but my argument is that how is that my problem as the amount I was told to pay, I paid and in my understanding service fees were included in that amount. I feel either my information has been leaked and I was left vulnerable and yet if there is any discrepancies in their system how is that my problem. I'm being taken advantage of as they are they trying to ****** more money out of me. And if somebody can call me with all my information and the amount I'm owing, that shows the weakness of the system and the ***** taking place