If you are not able to open cpanel, try the following:
1. If you are not able to access the cpanel due to your home/office connection blocked the port, you can use http://www.rxproxy.com to bypass the limitation.
2. If you still not able to access your cpanel, try to check your home/office router, this could be due to some router misconfiguration.
3. Otherwise, please drop us an email so that we can assist to troubleshoot. Provide us your IP address (you can find it via whatismyipaddress.com