 I have been working at a social media management company as an analyst for a few months. During the interviewing process, I mentioned the reason I’m looking at changing companies was because I wanted a job with more regular hours. When was presented with the offer, I noticed there was no concrete mention of work hours in the contract. 

Fast forward a few months, I had been working 9am-7pm and usually 11pm-2am the same day. This happened very often. I don't get paid overtime, I'm on salary. I was very overworked and was getting urgent emails that required immediate attention close to midnight multiple nights every month. I talked to my manager (Lets call her Lisa) who said “people at this company are global so we need to reach you 24/7, but we don’t expect you to work after you finish your assigned work.” This does not happen though, I am never done. As soon as I finish up a project, they send me another. I told Lisa I cannot keep up and she then took a look at my workload and was amazed I was able to complete all the assigned work (she was surprised even though she was the one assigning it). She told me she would take some clients off my plate and redistribute it to other employees to make it easier.

Then Lisa quit. She told me she was over worked. Her manager (lets call her Kate) took over. While this was happening, my dad suddenly passed away. I have been struggling every day and crying every night over this loss. My company was struggling taking care of my work load so after two weeks I came back to help out my coworkers.

I told Kate that Lisa was working on easing my work load. Instead of making it easier, Kate has added numerous new clients and reports that I am fully responsible for. This will add more hours than before. I told her I wanted some time off during the holidays over the public holidays (I'm Canadian), and she said no. She said I have to work on the reports and they can’t be given to another team member who does not observe the holiday. 

I went to HR, and they told me the same thing. The company is a 24/7/365 company, and stat holidays are not holidays for me. 

I am at my breaking point. I have saved a lot from working so money is not a problem. My sanity is. I love the work but its just so overwhelming and I keep getting more work to do.

Does anyone have advice for navigating this situation?

TL;DR Manager expects me to be available 24/7 while working from home. I'm absolutely overwhelmed and on the verge of quitting.