did not receive full tax return amount

I have not received  my full tax return. I filed on turbo tax and was supposed to get back $1,523 but without a notice it was changed. I only found out it changed when i was checking the status and it had taken off $1,400 but the $123 has already been deposited. I’ve called the IRS number several times and no one has answered in the past 2 weeks. I contacted my local HR Block and they explained it could have been stimulus that I have not received at all. She said the only thing I could do is wait for the notice to arrive in the mail. I would like something to be done so I receive the $1,400 that it told me I was going to have.