Charger for my laptop

I've an ASUS Vivobook S 15 OLED, and recently my main charger (90W) stopped working
My roommate also has a laptop from the series so I checked with his charger and laptop and it seems like the problem lies in my charging port
I've been using the USB-c port to charge my laptop
But my phone charger is only 65W so it's incredibly slow
I also tried my friend's OnePlus phone's 100W charger
But even that showed slow charging
I want one USB-C charger so I can use just one charger for both my phone and laptop, and it also saves tons load of space
But even a 100W charger isn't working with my laptop
I don't know what I'm getting wrong
Is it related to how much power the charging brick can take, OR does it have something to do with the cable ??
I have a little bit of knowledge but I'm very worried with this issue
So I would like some opinions on what the problem is AND what charger should I buy