Sorry----there is nothing anyone in this forum can do to help you get the advance. It is doubtful that calling Credit Karma about this would do you any good for this year. If the information in the system shows that you are not eligible, then you simply are not getting the advance. Perhaps by next year you can sort out the issues you are having about child support etc.
https://turbotax.intuit.com/refund-advance
https://ttlc.intuit.com/community/intuit-account/help/is-credit-karma-a-part-of-turbotax/00/2092900
https://support.creditkarma.com/s/
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**