I replaced mine early in the recall. At that time it was quicker to call after you filled out the online form. Only took about a week at that time. They will send you a master key for removal and the new cylinder. You will return the master key and your old cylinder(s). in a prepaid envelope. Call if it's been awhile since you registered, but I heard they are swamped with requests right now. Be patient, but for safety sake DO replace them!
You can avoid reality, but you cannot avoid the consequences of avoiding reality – Ayn Rand