(4)To ensure a prompt and timely handling of complaints, crowdfunding service providers should acknowledge receipt of any complaint and inform the complainant within 10 working days of the receipt of the complaint about whether that complaint is admissible. Upon acknowledgment of receipt of the complaint, the complainant should receive the contact details of the person or department for any queries related to the complaint, as well as an indicative timeframe within which a decision on the complaint can be expected. Where a complaint is deemed inadmissible, the crowdfunding service provider should inform the complainant of its decision and provide the complainant with the reasons for that inadmissibility.