New Activation Code

Good Day

After running into software issues I had to reinstall  my Windows completely. After reinstalling Windows I had to reinstall Bitdefender also. I received my Bitdefender as a gift from my parents for my devide, yet the activation code received after installing Bitdefender is no longer active. How do I get a new activation code from Bitdefender? The code first received was only valid for 24 hours and no longer works.