My aunt got a power of attorney over my grandparents. My father died in 1998. she got the POA in 5/2016 sold all my grandparent property and land,

Often the agent under a Durable Power of Attorney must sell property and land to pay for the care of the person who granted it.  But some agents do violate their duty of trust, fail to report to the person who granted them the power, etc.  If you would like to discuss the situation with an elder lawyer near you, you can find one on the website of the National Academy of Elder Law Attorneys (www.naela.org).