The 2 change can't b applied on existing staffs because it was stated in ur OL
this company so chinaman

Firstly the Employment Act only applies if your salary is RM2000.00 or less per month. Even then Clause 19 does not allow an employer to withhold your salary for any reason.

Secondly, unless you employment agreement specifically provides for the holding of your salary in express terms, it is a fundamental breach of your employment agreement and/or labour rights and no employer is entitled to withhold your salary for any reason whatsoever.

I'm fed up with employers thinking they can get away with this crap.

You can quote me on this.

Sounds like you can legally debate this, but it would not be productive for your long term future at that company to do so. Smaller, local companies usually do this, probably because they see some need to change policies to try protect the business at that point in time (such as very high staff turnover, etc).

If the changes to notice period and probation period is not excessive, then I personally don't see it as a big deal. If its that bad a change then it will impact their future hiring and probably it will be changed again later. I doubt it is that terrible a change but really depends on how each individual feels about it.