Lending Institution issued loan on property owned without my knowledge, or written consent. I am on title and deed of property. What can I do?

If the real property is your homestead, the mortgage is not valid.  You need to make a demand that it be released.  If they don't release it, you can sue to quiet title and be entitled to a judgment for your attorney fees.  If the real property is not your homestead the mortgage is only valid as to the interest in the real property actually owned by the person who did sign it, e.g.an undivided one-half interest.