I Need Answers TPG Aint Goin

Can you look into getting the rest of my money from TPG my refund was shorted for no reason I have spoken with the IRS 

The IRS Said They Had No Reason On Shorting My Refund. The IRS Said They DID NOT Shorten My Refund. Many People Are Having Issues W TPG. TPG Is Are Holding About $2800 Of My Money For No Reason I Have Reached Out To Them Twice & I Have Not Yet Received Any Answers I Need My Money