Fake emails generally have some incorrect spelling in the name of websites.
WhatsApp said that they are continuously working with industry partners to provide the latest security improvements and to help their users.
Do not share all your personal details on social media like your date of birth or government ID proofs. Fraudsters may misuse those details.
Credit card is a double edged sword. If you use it wisely, you will be benefitted. If not, it will become a burden.