CartiVex is sold with a 60-day money-back guarantee, running from your purchase date, not from when you open the bottle. A refund requires at least 30 days of use before requesting — meaning the practical window to evaluate the product and still qualify for a refund is roughly 30 days.
Contact CartiVex's official support directly — not this website — using the contact details on your order confirmation, with your order number, after at least 30 days of use and within the 60-day window from purchase.
Calendar both the 30-day minimum-use date and the 60-day deadline the day your order arrives. If you wait several weeks to start using it, your practical evaluation window narrows accordingly.