Reinstall Bitdefender on Formatted PC

Good day, as you can see I am new here.

I had to send my laptop to the Techs to be repaired as it is still under warranty and and and......

They unfortunately had to format my pc and hence I am now busy reinstalling all my software.

Where do I download and reinstall Bitdefender Total Security, as all the DONWLOAD sections gives options of buying.

I already bought the package a while back, just need to install and then login again.