I handed my notice into my job and have about week left until I leave. Came up with an agreed plan with management on what tasks etc I would do just give a good handover. However work have now made it incredibly difficult. My email account has been deleted as well as the system we use so can’t access anything to actually do my job, everyone is ignoring my calls and messages when I’m raising this issue so I’m kind of stuck on what to do. Normal circumstances I wouldn’t be bothered as I’m leaving but I didn’t want to leave on a bad note and I want to get a reference. Any advice on this?