Complex sentence: The show was hampered by technical failures and this contributed to a poorer overall sound to Vicky's rendition of her song, having to abandon her ear-piece mid-performance.
Split into simpler sentences: The show was hampered by technical failures and this contributed to a poorer overall sound to Vicky's rendition of her song. Her performance of the song was hampered by technical difficulties, leading her to abandon her ear-piece mid-performance.