The easiest and most convenient way to do this is through your own online portal, myHavebury.
Not only can you make a payment but also view your account details, report a repair and much more!
All you need (to register) is: your Havebury account reference number, your surname, date of birth and your email address.
Once registered, you can access this all at the click of a button and via the App;Apple App Android App
There are other ways you may want to pay: