The validation period is a protection established by Together Price to grand the joiner a warranty of full refund in case of problems.
As admin you can view the amount received on your Wallet in real time, but you can only have it available after 25 days. This is a validation time needed to protect the joiner.
As a joiner, you have 25 days from the moment you send the fee to request a refund of the fee you sent only if the admin has compromised access to the shared service.