Is this correct?

No. One better phrasing would be (assuming the person to whom you refer actually personally broke the vase) "You broke the vase."

Thanks

So, my sentence is incorrect or it is weak?

Is This correct?

Don't get it broken.

Your original sentence says that the person to whom you are speaking has broken the vase.

Your new sentence tells the person to whom you are speaking to refrain from breaking the vase - the sentences have different meanings.

Thanks