Type '@' in front of your message to communicate with admins on the server. If there are none, type '&' in front of your message that alerts all admins across all CS:GO servers. You can also collect evidence (logs, video proof) and make a ban request here: https://www.edgegamers.com/form/2/select
Alternatively, come onto our Discord or Teamspeak server. The forums are not heavily monitored so an admin seeing your post and jumping on quickly tends to not happen too often.