I should not be family sharing anything, how can I verify this isn

So I continue to have strange apple Buisness development using device configurations that I don't want on my device. I have an Apple WebKit that has been downloaded onto my phone and family sharing apps.. my husband died 16 months ago and his xwife, and other people are using their information and getting credit whatever in his name yet adding my phone to the family account to basically back all the BS to my phone! I don't share with anyone! I don't have a school account and I don't have a business.. it's just my iPhone SE! I've never filed a claim , done a return, applied for a card nothing.. this has been an ongoing problem for over a year! They are use a DUAL SIM CARD link so that its mirroring my phone