I forgot the Apple ID and it's password that I used to set up my iPhone 6S Plus when I and now it's locked and the request sais your request was denied
Today I found my old iPhone 6s Plus when I tried upgrading it to the latest version of iOS it showed me the activation lock screen and I forgot the Apple ID and the password I used to set up this device and when I tried requesting an activation lock support Apple kept telling me that your request was denied. Can anyone tell me what should I do I really need to use this device because it's related to my job.
iPhone 6s Plus