Instagram has been hacked

Hi I can’t gain access to my instagram account. There’s no email account linked and the mobile number has been changed. It won’t even let me click more options. It takes me to the video selfie page, then asks for my password. It then tells me the password is wrong and I can go no further. Iv tried everything. Can someone please help! Iv watched so many videos on you tube, nothing is close a soon can’t get passed a certain page.