just wanna ask bout this complicated things, when i dont have monster on my field...... and my opponent decide to attack me.. and i use call of the haunted calling one of ma monster then he chain it with mystical typhoon and i chain it again with stauch defender... so what the final result?

ok this is wot happens n the chain the attack starts then stauch defender happens then mst happens on the call of the haunted and that means he just hits u wit everything

First of all you can't even activate Staunch Defender, it can ONLY be activated when you already have a face-up monster on the field. Since Call of the Haunted has not yet finished resolving (or the chain for that matter) you can't activate Staunch Defender...

So this is the only thing that would happen:

Opponent: declares an attack
You: Activate Call of the Haunted
Opponent: chains Mystical Space Typhoon

RESOLVE:

MST destroys Call (no monster is summoned)
Attack goes through.

Even then, when he activates Call of the Haunted, the opp. can re-do his battlestep , so defender couldn't even be activated

He CAN'T "re-do" his battlestep, there is no existance of a replay in this scenario no monster has either been removed or summoned to the field there has been no change on the field, the attack continues as normal.

Yep...he can't get a replay until after the monster has already been Special Summoned, which has NOT happened nor WILL it happen now since he destroyed Call of the Haunted with Mystical Space Typhoon which prevents the monster from being Special Summoned (since Continuous Traps need to be face-up on the field to be able to resolve successfully)