HELP NEEDED! 2 CAs same collection account?

I have a $575 collection account showing on my EQ with Allied Interstate/Directv as the CA.  Recently I received a letter from AFNI, another CA for the same debt. Who do you suggest I contatc to DV and PFD?  

 

If AFNI now has this account, then how will I get the Allied Interstate collection off of my CR, after I settle up with AFNI?  I’m a newbie, and I need some expert guidance.

• how long afni collections respond to a goodwill letter?