I've encountered something similar with Apple. I tried to create an Apple id on a reconditioned Mac. It said the machine had been used too many times to create an Appleid. In the process it seemed to flag my phone number so I was unable to create an account on another device. The two support chats just told me to try again with no change. The first chat took about 40 minutes, there was a 5 minute pause on every response from them. At least on the 2nd chat I was able to ask for a 2nd level support call who fixed the problem.