My question is I received my stimulus check for $1,200 but I did not receive the extra $1,000 for my two dependents that I filed on my income tax this year how can I get this done do the IRS I cannot

How can I get in touch with the IRS or someone that can help me with this in a timely manner I really need this dollars and dollars I have two children that I'm taking care of and I'm not able to work