Refund came back much lower than IRS approved

According to the IRS and to the treasury offset department I should be getting my full $4951 refund (not deducting the turbo tax fees) I received only $2022. I’ve talked to TPG, TT reps, several IRS #s, treasury offsets, debt management,  bureau of fiscal service, and internal revenue. So far I and everyone I have contacted cannot figure out why I’m missing anything much less nearly $3k from my refund. I’ve reached out to the BBB in hopes of getting something resolved. I’ve also got several hundreds of us on a different forum willing to get a class action lawsuit going. I demand answers and my tax money back. I’ve also a tiktok warning others and giving them resources to help, so far tons of people are saying they used turbotax for years and this year were robbed of their full refund with no answers as to why. I hate that I have to turn somewhere else in the future bc turbotax has always worked so for me, this year the line was crossed.