I remember it as if it were yesterday. More than ten years later, the memories remain vivid. I was buying a plane ticket online—I cannot remember whether it was on Kayak or eDreams—and was redirected to my preferred payment method, PayPal. I cannot recall exactly what I did, but I was charged twice. After several days of hassle, my bank told me I would be refunded in 45 days.
What a long wait! Today I understand the mechanism behind it better. This post tries to shed some light on chargebacks in banking.