Moving house

We are 11 months into an 18 month broadband contract and have just moved properties. I selected to move properties via the app and received confirmation to my account and email. They also sent a new cable for us. Now that we are at our new flat - it appears to have given us a new account number so am unsure if we are still on the same 18 month plan? Also have connected the modem and am waiting for it to connect but the app under my new account still says 'track order'. I am so unsure on my plan and when it will connect etc.