Am I correct to assume you are at the final Loop right? So after the Fake Crash happens... If so:
That´s how you beat the final Loop in this Game. You need to trigger 3 Babylaughs - after the third one the Phone will ring.
To get the first one wait a Minute for the Clock to strike for Midnight, before you hear the Clock nothing you do triggers anything.
After you hear the Clock take ten steps and than stop for the first Babylaugh... count your Steps: when you are at 10 immediatly stop this will trigger one Babylaugh.
For the second Laugh you have two options for triggering it, one with a Microphone plugged into your PC and one without a Microphone. Both Options trigger the same one so if you have a Mic plugged into your PC i would recommend using the Microphone Option if not use the other one.
Babylaugh Nr 2 with a plugged in Microphone: Go near a Lisa Haunting and say "Jack" into your Microphone, don´t get too close to Lisa though, when she jumps at you you have to redo the Loop all over again by going to the next Loop. You are fine when Lisa is outside the Window or in the Mirror, she cannot jump at you at these Places so just get close and say "Jack".
Babylaugh Nr 2 without a Microphone: First find the 6 hidden Picture pieces in the Hallway... you might already done that. This Step is not necessary for getting the Babylaugh but makes it easier. After you are done loop one time and your Flashlight will change it´s Color to blue. And no matter how many times you loop again you are now stuck with a blue Flashlight. This is triggered by getting all 6 Picturepieces.
You can also get the blue Flashlight by just looping unitl you get it, before you have all 6 Picturepieces the Colors are random.
if you have Trouble finding the six Picturepieces watch this: (I know this is from the real PS4 P.T. but the Picturepieces are at the exact same Places in this Remake)
So when you have the blue Flashlight pick up the hidden Letters and put them above the Staircase Door... they will form the Word "kcaj" Jack reversed.
A Video explains this better I think so here is my Tutorial for doing this:
After you heard the second Babylaugh immediatly stop moving... if you continue moving you have to redo everything from Scratch.
Just wait... you will notice your Flashlight starting to blink. just ignore it and wait until you hear the third and final Babylaugh.
Now the Phone will ring... Pick it up by zooming in on it: Now you are a chosen one!!!
That´s it you are done here: Just leave the Loop like any other and you have beaten the Game!!!
Hope this was helpful.