Toothbelts skipped!

Hi people at mienem kadet 1.4er motor c14nz is the timing belt jumped around about 2 teeth seinher runs the cart no longer correctly the factory city put it now probably right on it but logically runs again think times the valves are flat or? can anyone give me a tip? and fits on c14nz the cylinder head of the c16nz? the axe I still lie in the cellar … please tell me where my trading possibilities lie