There isn't any account access on this public forum, you would need to contact EE CS - from another phone - to query this.
If you have a PAYG phone, then hibernation due to non-usage is a common reason. If you're on pay-monthly, then non-payment of bills is a possibility.
If your phone's symptoms are a loss of coverage, then it may not have been necessarily been suspended but just have a local outage - use the "check status" option on https://coverage.ee.co.uk/coverage/ee as a first check and consider using WiFi-calling in the meantime.
