someone with a bitcoin account is trying to hack me!! Who can help??
Those sort of emails (and phone calls) have been around long before bitcoin existed. The best or most appropriate action or response to such emails may be to mark them as spam and do not let them take up too much of your time (time is valuable!).
Sending money to random people who've contacted you through email (or phone) is usually NOT a very good idea.
Please don't let those sort of people get you down.
Moreover, if by chance (not likely) you really were 'hacked' (your email?, your webcam?) please considering using a more secure email provider, stronger password and covering your webcam when not in use. It might also be a good practice (?) to never write anything in email which could, in any way, be used against you. If you value your personal information too, please look into using PGP to encrypt future emails: https://en.wikipedia.org/wiki/Pretty_Good_Privacy
If you're going to buy bitcoins you should keep them in a secure and open-source wallet (rather than sending your bitcoins to random people who send threatening emails).
The Bitcoin.com wallet app is a fully featured non-custodial wallet which gives users complete and sole control over their funds. You may download the wallet application (Windows, Mac, Linux, Android and iOS) here https://wallet.bitcoin.com/
Please understand that Bitcoin itself isn't a company, just like “gold” isn't a company - this means that there isn't any official website that speaks for Bitcoin, just like there isn't an official website representing gold.