Since (I believe) your question may be behind a personal motive - do exactly as what you wrote. Don't pay your credit card and see for yourself whether the bank would want to cancel your cc or call you up to offer you a good installment loan program. And experience for yourself being blacklisted in CCRIS and just about all financial institution in Malaysia - no access to any loans / credit cards and even have problems opening a bank account.

Then come back here and tell us your story!

Yes ... since they already know your actual income.

Yes, you can convert to personal loan. Goto bank and discuss with them.
Then, cut the CC to stop using it.

Have you tried talk to your bank CC CS ?
Sometimes, individual need to learn a hard lesson. No matter how much advise we give, some still go ahead into deadend and hit-the-wall. So, hit the wall it is.