30 days from passing the acceptance test or from the date of our communication of the delivery date, in case of silence from the customer.
The guarantee restarts from the beginning when, within the active guarantee period, a bug or a new inconsistency with respect to the requirement document is detected.
In case of continuous malfunctions, the customer can request a full refund and, in the event of our disagreement, PayPal will evaluate the justifications of the customer and the seller to decide if the customer is entitled to a refund and to what extent.
PayPal is able to refund from our account even if we disagree.
See the related link www.paypal.com