Forgotten Apple ID and find my device locked
Hello. I bought a 9th generation ipad a few days ago in Bahrain, for my son. Unfortunately my kids put a passcode on it without telling me and they forgot it. I had to reset my iPad through my laptop, and now it's locked as it requires me to use the apple ID I created when I was setting up the iPad. Unfortunately I have forgotten that apple ID. I filled the activation lock support form, but they have denied my request.
I have all proof of ownership which I attached. I don't understand why there's not anyway to fix this matter? This is an iPad I own, yet just because I forgot the apple ID, I cannot use it? Is there anyway to fix this issue.
Please help, I'm really worried about this. Thank you!