Gelataro is advertised with a 60-day money-back guarantee from the date of purchase. Two things worth planning around: shipping time comes out of your window, and a 180-day bundle bought under a 60-day guarantee means the window closes while several bottles are still sealed.
Contact Gelataro's official customer support directly — not this website — with your order number, within the guarantee window confirmed at your time of purchase.
Set a calendar reminder for around day 50 the day your order arrives. This is the single most practical thing you can do to protect your guarantee.