I was excited to start a new job six weeks ago which sounded good on paper. I've realised colleagues have been very unaccommodating. Mostly giving 'I don't know' or 'It's not my role' or 'Ask x instead' when asking the simplest questions. No friendliness and basically saying, 'hello' when I arrive and 'goodbye' at the end of the day. I decided to ignore this attitude and get on with the work.
Here's the thing. I work part-time hours and my job spec was vague - basically listing a whole range of roles that I may have to assist in & some that I need to manage. I'm now doing ALL the roles listed on the job spec (which are several professions in themselves) squashed into my part-time hours! In addition, the other team members have sent me everything from the smallest admin jobs (printing) to designing the sales plan for the entire company!
One of the colleagues who has passed a load of work onto me follows up with about 20 emails a day - 'have you managed to get this done?', or 'can you do this in the next 30 mins' or 'this is urgent and needs to be completed asap!' but she is not my manager, is treating me like a child and the emails are driving me insane!
My actual boss saw me once at the beginning and only retuned this week. He asked if I had done x, y & z. When I said I had done x, y but not z due to work load he said 'I'm very concerned by this' and asked why not. I told him the truth - that my workload is huge, people have passed a lot to me, I'm spending a lot of time on smaller roles as well as my own role and haven't had time for job z which is something entirely different! He didn't seem at all sympathetic or understanding. We have a huge event next week which I'm taking a main role in (even though I've only been there 6 weeks). In addition, he now wants me to lead on another role at the same event and said, 'You really need to be up to scratch by then because the CEO will be there!' WTF? 
I asked if someone else could do the smaller jobs and his response was 'Just finish them quickly and focus on the CEO!' Instead of making my workload more manageable he's actually given me more! The big event is at the end of next week and in some ways I feel I should stick it out but the pressure is on and the people there don't seem to care for my wellbeing in the slightest. I've come to hate going into work. Not once have I felt appreciated in this position and the working environment is horrible - unprofessional, disorganised, hostile etc! I've become stressed and think they are expecting a hell of a lot after just six weeks in the role with minimal support. I am employed on a temporary contract (6 months) so this was never going to be a long-term role. AIBU to resign now? 