I purchased a license key for Win Server 2019 it was invalid and I lost my money since their support never did anything to support me. They asking me to send them a lot of proofs which I sent them them at least 2 times and despite that they were keep asking the same things all the time... After wasting my time with them I abandon the communication...
Try to avoid GAMIVO.com. Despite they are selling used keys they are not offering any support to their clients!