Assuming this is Florida, I strongly encourage you to read your local state property tax lien laws because there is some good news that might apply in your situation.
What effect does a tax deed auction have on the primary mortgage lien holder’s interest in the Subject Property following a tax lien auction?
In the event the lender does not redeem by paying the delinquent taxes on the property, a tax lien auction will wipe out the mortgage lien pursuantto Florida law, in the absence of any act or omission which may give the mortgagee cause to successfully pursue a Quiet Title action. A lender whose interests are wiped out will likely, pursuant to Florida law, claim an interest in excess funds following the tax deed auction to the extent there is an excess remaining following distribution to governmental and other priority
SOURCE: https://www.scribd.com/doc/35872761/FAQs-on-Florida-Tax-Deed-Sales
Additionally, you now also have proof of tax lien notice with the lender through your conversations with them. Please take the time to record any emails or phone call logs with the debt collection agencies about this matter so that if you file a Quiet Title Action, those records can be submitted as due process notification.
Debt forgiveness of the property and attachment to the original owner is one of the main reasons I buy tax sale properties.