Hello! @ada.lou.physio
Welcome to the LastPass Community.
We truly apologize for the problem, unfortunately we cannot offer you a direct number to contact support due to security reasons, but you can request a callback or create a support case by following the steps below:
From your LastPass vault, go to the top right corner click on your email address
Click on Support center
Top right corner clicks on "Loging to Support"
Then Click on "Contact US"
You will be able to choose the best option for you, A callback request, or a Support case.
You can change your billing information by going to your vault, go to account settings, general tab, My Account.
Please let me know if you need additional help.
Greetings!
Verlaine | Customer Care