Ok I just talked to the agent again.
They "accidentally" cancelled my tickets because we replied their email with EU regulations 75% refund below,
Thank you for your email. As this ticket was evidently issued as a business class ticket, I may kindly ask you to refund 75% (= 391,50 EUR) to my credit card within 7 days from today according to Art. 10 (2) lit. c of the Flight Delay Compensation Regulation 261/2004.
so now they with either offer ( the agent will need to contact their HQ),
1) Charge 25% of the tickets, and travel in economy
2) Reinstated the tickets, and travel in business.
So probably you guys that have business class booked, you guys are safe to go
For those who get cancellations, you either can request to travel in economy with 25% of the fare or business.
Will update you guys once I have the update from their office.