make sure your NCD is reflected correctly before moving to other insurer ...

you can use myeg, if you are ok with the insurance panel available on myeg

the windscreen coverage, u check whats available in myeg panel, and just buy accordingly only ...

Bear in mind, insurance is totally different from any vehicle sales. Once car is sold, it's insurance which covers your car. So, you can choose whichever insurance company you want, even from the start.

Also, renewing insurance yourself, without 3rd party or runner, you can get 10% additional off on the premium. This regulation already in place for many years by BNM (yes, BNM regulates not only financial, but insurance sector in Malaysia as well) and PIAM.

So, the calculation goes something like this, even with 55% NCD at 4k premium, you will pay 1800. Additional 10% into 1800 = 1620 to pay.
Then add back the PA, car towing, windscreen, named drivers, excess/loading, GST, etc.

When accident happens, you will deal with insurance company directly. Or the insurance agent. Unlikely the car sales man will help you deal with insurance claiming.