Jemimah Coates was celebrating with her boyfriend when she was allegedly attacked as the Hardwick Hall home in Sedgefield, County Durham.
The 20-year-old was hospitalised and cannot talk due the pain of a damaged windpipe and a suspected broken collarbone.
It is claimed there was a row on a dance floor and Jemimah then remembers being pulled to the ground and someone “stamped on her neck”.
“She said it all happened really fast, she didn’t see who it was or anything”
Speaking on Jemimah’s behalf, sister Olivia Coates, 22, said: “I got a phone call from Jemimah asking me to pick her up from the hotel.
“She didn’t sound right at all so I set off straightaway.
“When I got there she was absolutely hysterical, saying that someone had dragged her to the floor and stamped on her neck. I couldn’t believe what I was hearing.”
Olivia said: “I got her home and she was saying that she was finding it hard to breathe so I phoned for an ambulance.”
Jemimah, from Sedgefield, County Durham, had been attending the hotel’s ‘To the Manor Born’ event and the police have taken statements from her about the incident.
A spokeswoman for Durham Police said inquiries into the incident are ongoing.
When speaking to the Teeside Gazette, Olivia added: “She said that what she remembers is one of her friends falling into someone on the dance floor by accident but then someone turned round and pulled her to the floor.
“After that all she can remember is feeling blows to the head and neck, before it was all split up.
“She said it all happened really fast, she didn’t see who it was or anything.
“She can’t talk at all at the moment as it is too painful. She is just resting for now and we will have to see how she goes.”