Hi, I'mCustomer Welcome to JustAnswer. I'm reviewing your question now, and will post back with your reply ASAP.
from which store (or website) did you buy your computer?
Please talk with the store representative or contact the "website owner", explain what happened and ask for the duplicate charge to be reversed. the transaction should be reversed within three to five business days.
Or contact your Visa card's issuing bank, explain the situation to the bank and ask it to refund the charges.
let me know if you need further assistance
are you there, do you still need help please?