The past tense of get hold of the wrong end of the stick is got hold of the wrong end of the stick.

The third-person singular simple present indicative form of get hold of the wrong end of the stick is gets hold of the wrong end of the stick.

The present participle of get hold of the wrong end of the stick is getting hold of the wrong end of the stick.

The past participle of get hold of the wrong end of the stick is gotten hold of the wrong end of the stick.