Cap One was the first card that sent me an app in a long time. It was part of their Credit Steps program. I started just like you. I completed the steps but was stuck at the $500 CL for just over a year. I called right after I paid the $39 AF and asked about a credit increase. Longstory short ...Cap 1 gave me a CLI of $4000 to give me a CL of $4500. This was two years ago .
Keep using that card and keep on time with those payments.