It’s very likely just a pending charge if you haven’t received a receipt from Spotify via Email 🙂
A pending charge is a part of your bank or credit card company’s authorization process. When you submit a payment, they place a temporary authorization on the funds.
If the transaction doesn’t successfully complete, no money will be taken and the charge will soon disappear. The time this takes can vary, depending on your bank/credit card company. For more information, contact your bank/credit card company.