Change on account owner

My coworker passed away. I have successfully logged in and changed the contact information and email ID, but can I avert having to pay any outstanding balance? He passed away in March, but had been in and out of the hospital for months prior to that. I was unaware that there was even a website for us, until I spent time combing through notes.  In the account information, it shows an outstanding balance even though the account wasn't accessible to the business, nor was the coworker who passed even working during the times specified. 

Am I better off creating a new domain entirely, or is there a way to address this issue and let us move forward with any future subscription payments, while also keeping the domain?

Any help is greatly appreciated!