iPhone X: Side Buttons.

So this morning i have realised that my silent switch, up volume and also down volume buttons are not working at all, i've restored and powered off multiple times and still nothing is working, i'm using assistive touch at the moment but is very frustrating, has anyone else had this problem and been able to fix it please as i've had so many problems with this iPhone X and I'm almost ready to get rid of it at this point in time!

any help would be greatly appreciated, thank you.