Bad services regarding accounts

I have a loan with Capfin. As I am unemployed, I was unable to pay the monthly installments on this account. The account was then handed over to a debt collector. This is the second complain regarding the same matter between me and Capfin. Three different debt collectors is trying to collect monies for one account. At this stage I am paying Mooney Ford for this account, now Nimble Collections also demands monies for the same account. This is being going on since last year. Which company must actually get the money. I phoned both the debt collectors and both confirmed that the account is with them. Nimble Collections even send me a statement regarding this account and charged me for a phone call and it is not even my number. There interest for one month is R596. That is totally ridiculous. In the meantime this is affecting my ITC, for leaving me in the dark.