Okay so I was looking around windbot while waiting for update and I noticed it says 'days 90'. I'm now on 12 but I only bought it 9 days ago. I did however transfer some to a friend so I know I would be a bit lower but I only transferred I believe 18 days. He gave me 10 days prior to this because my license wasn't activated right away.
I then transferred 18 back, 10 what he gave me and 8 what he paid for via tibia coins.
So in total I had 40 days, It's been 9 days since license that leaves me with 31, I transferred 18 to my friend which puts me on 13 days. I guess it's been a day extra since I bought license or something but that's fine.
So now my license is currently paused at 12 days. The image below shows the 12 days remaining on my license as well as the product I bought. Of course you can double check all that from your side to confirm everything.