Their probably trying to sell you supplemental insurance and Part D for drug insurance.
Medicare started taking their monthly charge out of my Social Security check on my 65th birthday even though I called them and told them I didn't want it due to being cover by my wife's Cal Pers medical benefits for another six months before she turned 65 yrs. old
Our Government is trying to grab every dollar they can from us taxpayers, time for a insurrection like the Boston Tea party LETS GO