You should have access to your website dashboard. It is clear that you ask for more than Nabble offer through their free service and that you need to pay for Premium Support. Elsewhere you say that you haven't the money to pay to remove adverts. It seems that you may have to abandon your project as you do not have the resources to fund it.
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.