2001 Daewoo Matiz starting and engine noise

bought a second hand matiz. had done 67000 km. ran fine for about 3 months then problems started. first didnt start. one workshop changed the timing belt, clutch and compression plates, and some bearings (dunno the names). few days later, the engine began to make some noise like [b]metal scraping on metal[/b]. [u]however noise disappears when i push the clutch pedal[/]. visited different workshops, all say different things. and the starting problem still persists. what to do??