By Liam Buckler A mum is begging President Joe Biden for help three years after her daughter mysteriously vanished in the US Virgin Islands from her boyfriend’s catamaran. Sarm Heslop, from Southampton, had moved to be with her new boyfriend, Ryan Bane, in the US Virgin Islands and lived together with him on his boat. However, in March 2021, the former air hostess vanished in the middle of the night from the catamaran and she remains missing – with her family believing she was killed. Heartbroken mum Brenda Street said Sarm and Mr Bane had been out at a sports bar in Frank Bay, St John, on the…