I am sorry to learn of this situation. My name is***** am another expert on the forum.
I reviewed the prior question and I believe that I can assist you with a little more direction here.
It appears that what you are looking for is documentation to help you with the payoff on the loan.
The seller's statement is helpful, but it is not definitive (the statement saying the home is sold does not have any bearing on the actual payoff other than being circumstantial evidence to support your position).
If you sold your home with an escrow company or agency (the company that prepared your seller's statement), they should have records for your escrow showing who the final payments went to and be able to provide you with documentation to support the payoff to Wells Fargo, as well as possibly even have check numbers and additional documentation. (The escrow company is going to be your best source of evidence/documentation to support the payoff).
Once you have this documentation, you can forward this to Wells Fargo and their loss mitigation department (whoever it is that you are corresponding with in regards ***** ***** delinquency claim and the credit reporting), and forward this additional documentation along with contact information for the escrow company.
I will forward your question along to Customer Service regarding your concerns with the additional service offer that you received.