Yes. Here's an extract of the email:

….
We regret to inform you that an unfortunate error occurred during the fare filing process, which resulted in the wrong fare being filed for your reservation. Given that this was an error, please accept our sincere apologies for any inconvenience or confusion this may have caused.
We understand the importance of your travel experience, especially when booking Business Class, and we are committed to resolving this matter promptly and to your satisfaction. Upon identifying the error, and inlight of this situation we would like to offer you the following options:
1. *Full Refund*: Should the provided options not align with your travel plans, we completely understand. You have the choice to cancel your booking and receive a full refund of the ticket price. Your satisfaction is of utmost importance to us.
2. *Travelling in Economy Class*: We understand that your initial booking was for Business Class. However, you have the option to switch to Economy Class without incurring any additional taxes. We will also process a refund for the difference in taxes between the Business and Economy Class bookings.
3. *Discounted Business Class Fare*: Alternatively, if you still wish to travel in Business Class we are extending an offer for you to pay an additional 1000 EUR per person which marks a 400 EUR per person discounted to the correct fare of Business Class. We would be delighted to accommodate you in the Business Class.
Please understand that we are taking this situation seriously and are implementing measures to prevent similar errors in the future. We value your patronage and the trust you have placed in us, and we are committed to upholding the highest standards of service.
To proceed with your preferred option, kindly reply to this email.
Once again, we extend our sincere apologies for any disruption caused by this error. Thank you for your understanding and patience as we work to resolve this matter to your satisfaction.
If we do not hear from you or receive your decision within 7 days, we will proceed with a full refund of your ticket.