Most accounts are compromised because a password was reused somewhere that later suffered a breach. Two changes fix the bulk of that risk.
- Use a different password for every account. A password manager makes this practical — remembering one strong password instead of dozens.
- Turn on two-factor authentication everywhere it is offered, starting with your email account.
- Secure your email first. Whoever controls your email can reset the password on nearly everything else.
- Prefer an authenticator app over SMS codes where you have the choice.
If you think an account has already been compromised, change that password from a different device and get in touch.
This is general guidance, not a guaranteed fix. The same symptom can have different causes on different machines. If you are unsure about a step, or it does not help, raise a ticket and tell us what you tried.