Returns and refunds

How can I return a product?
How can I replace my purchase?
Is it possible to return a return to a physical point of sale?
I wrote to the Customer Service email but changed my mind and decided to keep the order. What should I do?
How long does it take to receive a refund?
How will I be reimbursed?
Can I receive a refund on a card other than the one used for the order?