I filed my 2019 tax return and never received the money, even though I had confirmation that it was accepted. How do I find out what happened? how do I get my money?

This was in the height of covid and customer service sucked. Turbo tax said to talk to IRS - IRS  said no one could talk to me, It was about $1500 and I never got it, would be super helpful to have now especially since covid has calmed down and 2 seems to be more accessible help around-