Well, do you happen to accidentally have other account in the past but forgot about it? Or perhaps someone else also played on betfury? Can you perhaps ask whoever you're living with if they happen to also have an account on this casino?
Maybe one member of my family could have ,as hes young and interested in sports but im not sure
The point is they didnt give me any proof and i never used someones device or WIFI, i always been playing on my personal device