Deductions & credits

This happened to me. I received a refund amount of $1400 less than what turbo tax stated my total refund was. I filed as an independent, I am not claimed on anyones taxes and have no dependents of my own. So the first four errors are irrelevant to me. The only remotely applicable error is “the amount was computed incorrectly”, in which case turbo tax guarantees 100% calculation guarantee. I qualify to receive the stimulus from March of 2021, I did not receive it at the time so I claimed it on my taxes. But now the IRS changed my tax refund and I got much less than expected and when I call I get the same “call back another day” prompt. What can I do? I’m a poor college student living on my own and I needed that money to pay for car repairs and other expenses. I am eligible for the refund but the IRS doesn’t think so… what can I do to fix this??