Transfer ownership

I bought 3 ring cameras yesterday (2 stick up and 1 wired) and with all the three, I am getting an error "The device can't be transferred at this time. We have emailed the registered owner to let them know how to complete this transfer". I have contacted the owner and he confirmed that he has not used these cameras for more than 6 months and before not using them, he deleted all the cameras from his account. I even saw that in his app and there was nothing there. I spent 1+ hours today with the customer service and first they said that it will take 15 days to transfer and later a Level 2 person said that they cannot do the transfer and I should buy new cameras and they will give the discount. I did not understand this on why should I but the new cameras when these cameras are just fine and I should be allowed to use them. I sent the pictures of the cameras and their MC ids as well to ring support team to prove that I am in the possession of these cameras but still the support team was adamant that they cannot do anything. Can someone help me on how can I get these cameras working? I am fine even for waiting for 15 days if that actually resolves the issue but I doubt as the Level 2 guy told me that it cannot be done.