Choke problems

Hi Guys

After getting my car bck from having its rocker cover gasket replaced ( it still leaks) the numpty mechanics somehow have messed up choke on my car (89 carb clipper) so now it sits at 2000 rpm,  I'm assuming they have touched or done something to the carb, any help would be great
(ps not taking it bck to them)

Skye

Ps my carb failed its emissions, is it easy to adjust??

is it the original 2e2 carb? if so read the faq post stickied at the top i would start with vacuum pipes, 3/4 unit and the valves round the back. failing that look at waxstat and the coolant channel oring in the inlet