you are in H1b you might be elligible to apply for canadian PR if u are interested

For more information regarding the H1B Strategic Recruitment Stream (H1B SRS), please visit http://www.alberta-canada.com/immigration/campaigns/h1b.html

I think that your dhoti consulting company is not asking you anything extra they are just asking you to pay $600 to run your paystubb and save your status. If you dont have it just speak to them frankly. I bet they have other ways to save your status (like sick leave). They also provided you food and training and at  least they tried something for you.

I am also in the same situation like yours I have H1 b but no job. My dhoti consulting company couldnt provide any trainings, couldnt do any marketing, harldy answers my phone calls, most of the time husband is in india and wife take cares of the business. I even asked to generate a paystubb for me and I'll pay for it but they refused . So no any kind of support at all. but yours doesnt sound that bad to me. May be I dont know the real situation but think twice before you ake any action.