Refund was amended and an Audit is coming

So I got half the refund that was on my initial tax return. I got a letter stating they redid my taxes on the grounds that my dependents social were wrong and I made over $75k—I don’t have any dependents and I was on unemployment for COVID most of the year. I made like $25/k. I paid for the plus turbo tax with 110% guarantee  and audit protection. What’s my recourse with turbo tax?