Plain Green and others
As far as Plain Green is concerned, they often assign the account to collection agencies. The collection agencies report the accounts to credit reports also. Plain Green is tough to deal with. The collection agencies don't agree to remove the listing from credit report easily. I don't want to scare you. But it's the fact.
It has been seen that Plain green sells the payday loan to a particular CA and the CA report to the bureau. There is an internal collaboration between them. If you have already paid the principal amount, then show the document and make a complaint against the plain green to your State's attorney general. Also dispute the error in your credit report with the credit bureaus as well. Also, if you have paid the p[rincipal amount to the mobiloans, then close the account or remove the ACH authorization so that they can't pull out more money from your account.
I would agree with Patricia and ditchdebt. But I have few extra words for you too...
Why do you take out payday loan at the first place? Payday loans are traps to make you fall into a debt cycle that never ends.
Deal with plain green now, and make sure never go for payday loans ever again...