Hi Michelle, welcome to the forum! There's a wealth of information here to help you on your credit journey.
I hate to say this but, with your score, multiple inquiries and maxed out cards, ccc's are looking at your CR as if you are in extreme financial stress, and you'll keep getting denials. Red flags are going up all over your CR.
Is there any way you can stop using your cc's cold turkey and start paying down the balances? The utilization and # of inq's are hurting you majorly badly.

You will see a substantial score rises when you start reducing your utils below 50% and beyond.