1. Install anti-virus software to scan/kill Trojan and other viruses as soon as possible;
2. Disable plug-in/extensions for your browser, trading bot or third-party APP and uninstall unknown software on your computer;
3. Change the password for your devices and accounts;
4. In a critically dangerous situation you should format your hard drive and reinstall the OS (operating system) on your computer (If you are not sure how to do this, seek professional assistance);
5. Consider seeking help from an information security expert to determine how to achieve the best possible level of security;
As you have said, you already formatted your computer and you are done scanning for malware and detected nothing, right?
But have you followed their instructions regarding your extensions? It seems that it is the problem that you are looking for. It is safe to assume that you should remove those extensions to be safe.