Family members driving me mad

Has anyone else had problems with family members thinking they have a say in your wedding? It’s driving me mad now from my Mil saying she’s buying her grandsons the same suits as the wedding party because she wants them to look apart of the wedding, to my partners auntie saying she’s not coming to the wedding because she’s not invited in the day and she thinks she should be because she’s his god mother (she hasn’t even met our 6 month old daughter so I don’t know why she thinks she would be invited in the day) to my auntie saying she’s gonna bring her daughter in the day because there travelling along way even tho my cousin isn’t invited in the day !