cort curbow 5-string active bass buzz

hi i recently bought a cort 5-string active bass and the strings buzz alot more than they normally should,i tried adjusting the bridge and sadddlesbut i just cant seem to work the buzz out completly,it was buzzing up to the 12th fret but i got it down to 1-3rd frets.ive tried everything i know,i even went to the cort website,they have factory specs on heights and adjustments but i dont know too much about that stuff.any ideas or tips would be awesome,i have to use this bass soon so PLZ HELP ME