Saturn payment with voucher?

I bought a new nintendo switch at Saturn where the total price was 322 euro, of which I wanted to pay 35 euro with vouchers and the rest with a credit card. Now, after my order, the total price is still 322 euro in the order confirmation, although I would actually have to pay 35 euro less with the voucher. Does anyone know whether this is normal that the total price is the normal price and that only the discounted price is then deducted from the account?

No, the savings must also be there