Geometry settings....

I have an 2009 Octavia estate 1.9 tdi , I have a problem with the cornering ,when i do a left turn it major steps out and feels lose at the back end. It has had the rear shocks replaced on the back, and also i`ve had it check on a hunter machine at a tyre centre , who adjusted it , however it still does it to no avail....it really is a bit scary at speed so any ideas?????