The agency pays you; GigSpace never holds or moves money. What you see in the app is a record of what the agency owes you, not a payment being processed.
Your earnings screen shows what's been paid, what's owed now, and what's coming from gigs not yet played. A payment is released once the gig is completed.
Your invoice to the agency goes out by itself each Monday, for the gigs completed in the week before (Monday to Sunday), once your payout details are in. On the earnings screen you can change that schedule: every 2 weeks sends every second Monday for the fortnight before, and monthly sends on the 1st for the month before, so the gigs of each week, fortnight or month go out together, not one by one. You can also turn it off, or send an invoice yourself at any time.
Unless you've agreed something different with the agency in writing, the agency pays your fee within 30 days of the gig.
Add your payout details in your personal details, so the agency can actually pay you: IBAN, BIC and bank name. It's the most common reason a payment stalls.
If you haven't been paid, contact the agency, not GigSpace. We can't pay you on their behalf and we can't see their bank account. If an agency is repeatedly not paying, do tell us: that's something we act on.