Western Sky/Cash Call (yep....again)

Hello. I am among the many here who took out a $2,600 installment loan with Western Sky ($2,575 after the fee was taken out). Based on other posts I double checked and the paperwork was originated by WS ("Lender: Western Sky Financial, LLC) and then three days later was in Cash Call's hands. Here is the verbiage from the email I received:

"Please be advised that your loan has been sold to WS Funding, LLC. This letter is your official notice of the loan sale and the transfer of loan servicing. Effective today, your loan is now owned by WS Funding, LLC and will be serviced by a company called CashCall."

I have made three payments to Cash Call ($253, $295, $295) and I'm currently coming up on three payments past due. I have gotten several messages from a company collecting on Cash Call's behalf called Delbert Services Corporation....I'd rather not have to go to court to deal with this, but Cash Call has thus far not been willing to work with me.

I'm a resident of RI. Is this loan's paperwork legit or can it be challenged based on the "tribal" designation?

As always, thank you for what you're doing here, everyone!
GHR5