ChargedMinecraft
ChargedMinecraft is a cool server where you can play for free! They have 7 different game types and are always adding new ones. Each server has its own rank system. When you start, you get a Starter Package that gives you a starter rank on all the servers. If you like the server, you can donate and get even higher ranks.
If you need help, just leave a support ticket on their website. Have fun gaming!
Mc.ChargedMinecraft.Com