After making a transaction online you should receive a notification or a purchase receipt to your email or phone where you can see date \ time \ name of the service \ amount etc.
If the payment was made by mistake, you are not satisfied with the service or you didn't make the payment yourself, you should contact the Customer support team of the site where you made a payment and apply for a refund. You will need to attach the purchase receipt or give other requested details and provide a reason for the refund. Every site has its own Refund policy, so the refund amount may differ.
Also, please note, that the refund process may take up to 14 days depending on the bank.
To avoid misunderstanding with payments, please read carefully Terms&Conditions before making a purchase.