For NowTV Broadband and Calls, yes.
For NowTV streaming over the internet, no.
If you have a specific query about using NowTV, you can post it here, and see if other members can help you.
Or if you need to talk to NowTV officially (billing issues and the like), then there is a live Chat service you can use.
I don’t know what that mobile number given above is, but it is nothing official for either aspect of NowTV, and I might want @Anonymous User to come back and give us a bit more information about what it is and where it came from, before I ever tried calling it.