You have two options. You can add a policy offered by Bestow (and manage two policies from different companies) or you can replace the one you already have with a Bestow policy.
Keep in mind that adding too much life insurance from separate companies may make your application ineligible for additional coverage. Replacing insurance can be a little tricky but our enrollment application will walk you through everything you need to do.
Some states do not allow policy replacements, see this page for that list.