PC crash and licence expired

I have a Freelance PLUS Licence for Studio 2015. One of my computers crashed and I was obliged to replace the hard disk. At restart, Studio says my licence has expired and asks me to activate it, but when I copy the activation code, the activation fails. In my SDL Account I have 1 licence in use + 1 extra activation in use. On the secondary PC (a laptop), Studio is still working but I really need to have my licence back on my primary PC. Could you help me and tell me what to do? I really need someone resets my licence, please.
Thank you so much in advance!