You speak & write in English much better than i can speak any other language at all, so do not appologise to me. It is not necessary.

If the shaft is broken, you will need to look at the bolt that was holding down the "pedestal" at the back of the engine. Is it broken, or was it just pulled straight out of the head?

If broken, then you will need to get the broken part out & you need another bolt.

If it pulled out of the hole, then it has ripped the thread out as well & this will need to be fixed.

It sounds like it will be better to get a whole rocker assembly from another engine. Fortunately, they are able to be used from almost any of these "A" series engines. It would be best to replace all of the push rods too, but you must get these from an engine that is the same as yours [A14?] as the diferent engines used diferent length pushrods.

Are there any places that sell used car parts [wrecking yards, or sometimes called breakers yards] in your part of the world?