Can I call off a shift to work a different shift?

No, shift hopping is strongly discouraged.

Once you have accepted a shift, you have committed to that job.  GigWorx takes this commitment seriously.  We do not encourage employees to pick up a shift unless they are 100% committed to working that shift.  Frequent cancellations hurt our relationship with clients and may result in fewer job opportunities and lead to distrust with our clients.  Please read shift descriptions carefully and make sure you are comfortable with the shift duties, location, and pay rate before accepting.