My hotmail account has been hacked and the password and security questions were changed so I can’t get back into

My account was hacked and all of my security information has been changed so every time I try and reset my password it doesn't work. I have repeatedly tried resetting it and have now been locked out of trying. I also found a pone number online for Microsoft help and am now concerned that this number might have been a fake as the email I received from them doesn't quite look legitimate.