Current Pro User-Where to Add License Key

I just got approved by admin to get a license, and instead of adding it to my current account they went ahead and ordered it. I still have 2 months left. Will that time roll over and get added to the new activation?
More importantly, how to I add a license code to my existing account? I do not see any place to extend my license using a code. Also, the code my admin gave me is different than mine, so does that mean I will lose content I created?

@Coralie you might be the one who can answer the best. Kindly

Could you please write this question and your account details to