There could be a few reasons for this.
1. Is your number switched "ON" in the Exotel dashboard?
Even if you're logged in to http://my.exotel.in, you need to be switched on to receive calls. You can check this on the top right corner of your account.
2. Are a part of the group that is configured to receive calls?
For example, if the group Exotel_Support is set to receive calls as a part of your incoming call flow, check if you're a part of the group. Go to the Co-workers & Groups page and check the group by clicking on it. If not, add yourself to the group by dragging and dropping your name to the group. (Note : Only the Admins have access to add the co-worker into the group)
3. Momentary issues
There could be momentary issues at the operator's end. Give it a few minutes and try again. If it's still not fixed, you can write to us at firstname.lastname@example.org or call us on +918088919888