If the owner who locked the iPad can't be found or won't remove the lock, you are the proud owner of a useless iPad. Apple will not remove the lock. We can't help you remove the lock. If you can get your money back, do so. If you can't get a refund, recycle the iPad responsibly.
Read this --> The All Too Common SAD Reality of Buying … - Apple Community
Ps: If this iPad is model A1430, it's a very old iPad (iPad 3rd generation, which was released in 2012, 10 years ago now), which is now so old, it's virtually useless, even if you could get past Activation Lock. Being over 10 years old, virtually no modern Apps will run on such an obsolete device. Sadly, this was not a very good purchase.