(for KL Siew's Use Only)
I am not surprised that you have to do all the work. It is very common in the smaller Chinese companies. Don't be surprised that more work will be coming. I wouldn't advise you to refuse doing this or that. Ask them about the appointment letter and you can talk to the boss about your problems but don't flatly refuse to do certain work. As far as I know, EPF contribution starts from the very first month. Ask the EPF about it.