Complex sentence: Jenny has stated several times that she has never left the band and on the contrary declared that all four original members are still band members and own the brand Ace of Base, by agreement with her brother Jonas and by legal documents.
Split into simpler sentences: Jenny has stated several times that she has never left the band. On the contrary, she declared that all four original members are still band members and own the brand Ace of Base, by agreement with Jonas and by legal documents.