Lady driver Frightened Car being tampered with..??

Lady driver with Fiat uno mambo.
Think kids been messing around with my car in the night?
Had a few failed attempts to steal but with no joy..
Frightened messing about under my car?

i) Car ground to a halt,would not budge even with handbrake off?

ii)air in tyres 13,16 and 20lbs although checked few weeks ago?

iii)steering wheel gone very slack when turning?

iv) foot brake now and then when press will hardly move?

v) sounds like when you are in a aeroplane, only now and then not all the time?

any answers much appreciated
Thank you