Dear Toni: I am not sure if I have enrolled in Medicare the right way because I am being charged a premium of $768 a month beginning June 1. (I turn 65 on June 14.) My friend Sue told me that I am being overcharged because she is paying $202.90 a month. I followed how she enrolled in Medicare by going online. I am not sure if I did this correctly because the invoice says that I owe $565 for Part A and $202.90 for Part B. My husband, Jeff, was laid off in March and he lost his employer benefits. Jeff doesn’t turn 65 until next year, so he has applied for an individual plan on healthcare.gov and I applied for Medicare. I have not worked full time since we married 35 years ago, and Medicare said that is my issue because I didn’t have enough years of work history. The Medicare agent advised me to visit my local Social Security office with my husband and to bring information to show that we have been married and that Jeff has worked at least 10 years. What should I do to correct my Medicare mistake?…