Ring alarm base station registered to different account

Hi while trying to add my ring alarm base station to my ring app I just get error base station already registered to a different account I have been on to customer service online chat and also have phoned customer service both have told me that the base station is not registered to any account I have tryed different phones and accounts they have just said it's a technically issue but will not replace the base station having spent £600 on the cameras and alarm system is not really great any help would be great.