Hi the fault is with the door handel iner clip and its easy to fix.
open the door and you will see a black blanking plug on the side remove this and you will see a scerw inside, using a t20 or 25 torx driver unscrew till it stops comeing out ( it dose not come uot of the locater ) with this done you can remove the door lock from the outside (use your fingers or a plastic wedge ).
You can then see the inside of the door handel , on the flat side there is the boden cabel this is a push fit.
on the top and bottom of the handel you will see two pegs and the plastic clips that have come off using a long nose plier refit and all will be good.
rember that when refiting the boden cabel not to pull it too tight ai the door will not open.
Hope this helps