wiring
I took a chandelier off and didn't took pic of the wiring. I have 4 cables with red black and green and an extra 2 cables, one with yellow( with green stripe) and black. And one with red and white. When I connect only the red and black the light switch doesn't turn the light off and it stays on all the time.
How should I contact it?
From what you've described, this is what I think you're wiring should look like. Keep in mind, this is just a guess. I can't see what's going on, and I'm an internet away, so I can't touch/measure/test anything.
The wiring diagram for the switch, can be found in the installation instructions.
If you provide images, and/or a better description of what wires and cables are in each box. I'll be able to provide a better guess, as to how this should be wired.
The diagram is based on your description, and is my best guess as to what your wiring looks like. If you're not sure what to do, or feel like this project is over your head. Do not hesitate to contact a local licensed Electrician.
The silver wire is also a ground. Chains are not grounding paths so a pendant needs 2 grounds - one down the chain to the pendant, and the other for the box cover.
I suspect the manufacturer ran an extra run of 14/2 (12/2?) Romex from the switch to support a ceiling fan which you don't have (yet). I bet the third black is folded up in the back of the box, but they tied this pair's white wire with the other white wires. That's making my spider-sense tingle, but I can't say why. Might make a good question.
Since the power is fed from the switch (no weird switch loops) you should be able to connect all blacks to each other, ditto the whites. All grounds must be connected together. I don't see any obvious way that upper steel plate bonds to the maze of ground wires above it, and that makes me a bit nervous. Is that a steel box above, and is the ground bundle bonded to it in some way? I see a screw, but it's not green and may be a physical mounting. Is the steel cover plate tightly screwed to the steel box?
As far as wire-nuts, each make of wire-nut is listed for certain combinations of wire. For instance Ideal's 73B (orange), 74B (yellow) and 76B (red) are covered in a document titled UL Listed wire combinations... Generally I like to be in the middle of the working range for a wire-nut, so I'd go yellow for 3 wires, red for 4, and orange for something that seemed on the smallish range for yellow.
Best Answer
I'm guessing you're in Australia (or NZ), and assuming the original installation was done correctly
the black is is the neutral, the blacks go together and connect to the chandelier Neutral terminal. the red is active, all the reds go together and connect to nothing else, all the green and green-yellow are ground and go together and connect to the body of the chandelier (if it's metal, else nothing) the white is the power feed, from the switch and connects to the other chandelier terminal power terminal.
If the chandelier has a "loop" terminal you can use that for the reds, if not get the modern version of the screw connector like the one on the green earth wires. https://www.mitre10.com.au/hpm-connector