Chelsea said Bensussen had "non-consensual sex with both of us while were completely incapacitated" at a party after they were handed drinks by the DJ.
"I remember his disgusting body on top of me and being so scared I couldn't speak," Chelsea wrote.
"It has taken four years to not blame ourselves and not feel guilty or les than human for it."
Bensussen has since posted a response on Twitter, saying the allegations "shocked" him and denying Chelsea's version of events.
"I want it to be known I would never hurt of endanger a woman. I would never drug a woman, and I would never put anyone in a situation where they were not in control, or take anything that they weren't offering."
He also said that "Chelsea's version of this story is not true".
Bensussen has since been dropped from the line-up for Los Angeles festival Low End Theory.
Brooklyn Electronic Music Festival has chosen to cancel the Low End Theory show. This is not the appropriate time to...
Posted by Brooklyn Electronic Music Festival on Friday, 13 October 2017
A statement from Northern Bass said "it is extremely important that everyone feels safe in the Northern Bass environment and at all Fuzen events".
"As a company we support anyone that finds the courage to speak up about harassment and assault in any form."
Where to get help:
If it is an emergency and you or someone you know is at risk, call 111.
• Women's Refuge: 0800 733 843
• Victim Support: 0800 842 846
• Lifeline: (09) 522 2999