How do I delete my backed up data from my Samsung account

[AC Question]

This has been bugging me for some time now. I understand that the question is quite vague so I'll try and be more specific... I was going through my settings on my Samsung Galaxy S6 and i noticed that under "Backup and Reset" I have the option to "Use my Samsung account to restore my backup data". Said backup data are call logs and messages I backed up a few years ago using a former device. So I restored the call logs and the messages and they weren't of any importance to me, so I deleted them again. Afterwards I tried deleting the entire backup. But I couldn't find an option anywhere for that. I've been searching google for hours and not one person has ever had the same problem as me. I can't find a forum or anything referring to this subject. Can anybody suggest a solution? Help of any kind would be much appreciated.