This group were contracted to work repairing doors at my university accommodation. They arrived at my flat as a group of around four men and got to work removing and repairing fire doors. I had absolutely no complaint about their work until for some reason they started to talk about their sexual fantasies and make lewd jokes. This made me a bit uncomfortable and as the only person in my flat (and a girl) I was too scared to confront them directly, so I emailed my accommodation supervisor letting him know what was said and asking if they could tone it down. My halls manager asked the men to leave immediately but they took a while to clean up. During this time they worked out that I was the one making the complaint since I was the only one there and started talking about me saying they found the complaint laughable and that I shouldn't care about it because 'I'm not twelve'. They even continued their previous conversation in defiance. This whole time I felt incredibly scared and started crying when they finally left.