Your question: "Im a U.S citizen and My mom came to the U.S illegal then she went back to mexico.. I file to get her to come back but when she got her interview with immigration they told her that she didnt qualify to get a visa or anything... Is there something she can do so she can get her visa"

Your mom is probably barred from re-entering the US. For how long will depend on how long she was in the US illegally, and if she immigrated illegally, or overstayed a visa. This article is a good place to start for information on time-barred entry, and will let you know if she is eligible for re-entry, or for a waiver of the time bar. I hope this helps.