EXP refund

IcyFirefly, on Jan 26 2021 - 14:31, said: Hello all,       whoever decided on the visual layout of the Italian tech tree should be shot. they put the heavies where the meds were and moved the meds rather than just add the heavies on the bottom. anyway i bought the medium tier 7 instead. I assume no, but is there a way to get the EXP back for it so i can spend it on the heavy like i planned? i have not actually purchased the vehicle, just unlocked it with exp.  Thanks, and again, why did they lay it out that way?!?!