My remote does not work and I can't find the number to call to get a replacement!!!
Are you using the smart voice remote used on the NowTV stick or 4K smart box ?
If so have you tried fresh new batteries and re pairing the remote once again where there is a small pairing button inside the battery compartment.
I am assuming your NowTV remote is still under warranty, and if so have a read of this help article.
If you purchased the NowTV device directly from NowTV, open the above link and on the right hand side of the page is a blue get in touch button.
You can get Intouch with NowTV either via their online live chat service or alternatively drop them a message.
Forgot to mention whilst you are awaiting for a replacement remote, if you have a smartphone you can download the Free Roku Remote Controller App from your phones App Store to still operate your NowTV device in the meantime.