Reapplying and freezing, do I freeze ARS or is it lakeside information resources or someone else??????

Applied for the consumer card the day it was issued, but was declined due to perhaps ARS or someone similar. I Have many credit cards, excellent credit, relatively few applications in the last year, would like to reapply after freezing, but who do I freeze and how long do I wait after the freeze requests?

Who do I freeze? ARS? is fax 866 422 0765 correct, or some other way to contact them?
Lakeside Info resources? Is fax 216 615 7604 correct?
Anyone else?

Is a simple request letter with photocopy of state id (california), ssn, name , address, dob and signature and name requesting a freeze sufficient, or is something else required?

Or is there a better way to go about reapplying? i actually believe I still have a flexperks card with us bank which I never used that they gave me after northwest worldperks disappeared.

Any advice or updated contact information appreciated thank you