I have music on my Itunes account. Unfortunately its on my laptop,which won't connect to iTunes. How do I get to my music, and sycn it to my iPhone?

I am not clear as to what the issue is.

You said:

"I have music on my iTunes account", do you mean Apple Music Subscription?

"its on my laptop, which won't connect to iTunes." do you mean iTunes does not recognise iPhone?

Connect iPhone to Computer / Mac

• Use your USB lightening cable --> Resolve USB-related alerts in iTunes - Apple Support
• If unable to connect --> If iTunes doesn't recognize your iPhone, iPad, or iPod - Apple Support
• Use genuine cable --> Identify counterfeit or uncertified Lightning connector accessories ...
• See how to --> Sync your iPhone, iPad, or iPod using iTunes on your computer ...