My account is blocked due to message limit but I have not sent that many messages.

If it feels like you are publishing/consuming fewer messages then specified in your CloudAMQP console and if you are using Celery - please check if you have disabled celery events. Celery recommended settings can be found here. Have a look att CELERY_SEND_EVENTS, --without-gossip, -without-mingle and--without-heartbeat.

If you are not using Celery, send us an email and we will have a look at your instance.