How do I find out if my account has been cancelled during cooling off period

I recently signed up to virgin media but after discovering how much work would be required for the install I changed my mind as allowed within the 14 day cooling off period. Unfortunately this was when I discovered the widespread reports of poor customer service by virgin media! True to form I have been passed from department to department, inexplicably cut off several times and kept on hold. Finally after a lot of convincing somebody has told me that my account has been cancelled, however I have received no correspondence from virgin media confirming this. From what I can tell (from the virgin app) I have no upcoming installation which would suggest that this is no longer scheduled, but my account appears still to be active which makes me worried that I will still be charged for something that I do not and never will have. I’ve also read other stories of people who have been verbally that their account has been cancelled only to discover that this hasn’t been actioned. Can anybody advise on what the next steps are and if or when I would expect to hear anything from virgin about my cancellation? Thanks!