Technical uneven tickover and hesitation on takeoff

[411 guy]

Hi all ,I own a 1.6 multiwagon 2 years now and love it, I recently had my timing belt changed by a friend of a friend who i specifically asked to get the camshaft tools(he used to work in the local fiat dealership) He said no problem., since the job my tickover is atrocious and my fuel consumption has also suffered, is there valve/camshaft timing marks where i can check if they are all aligned right? before i return to tackle the garageman.he did seem very thorough otherwise and i wouldn't like to fall out with him.