Fiverr takes 17 days for the money to mature and ready for withdrawal.I would kindly request if you would reduce the number of days to atmost seven so that sellers in need of the cash are able to get access to it at their own convenience.
Have you read the Terms of Service page? Here’s what it says, which you agreed to when you signed up:
“Revenues are only made available for withdrawal from the Revenue page following a safety clearance period of 14 days after the order is marked as complete. Top Rated Sellers are eligible to withdraw revenue following a safety clearance period of 7 days after the order is marked as complete.”
So you can’t ask Fiverr to decrease the clearance period, it’s already set to 14 days, and the only thing you can do to “fix” this is to keep doing good work and eventually become a Top Rated Seller, when you’ll get 7 day clearance periods