I suppose even if there were other compelling factors that could prove beyond doubt or conclusively that the other 14 accounts were not associated with the OP, he himself has admitted/acknowledged using a VPN. If that is something Shuffle are willing to cite as one of the reasons to take action against the OP he cannot really complain about that.
Since the amount is tiny but Shuffle still made an example of the OP, it seems clear this is about matters of principle on their part. If their terms of service have been broken they do have a right to take action against anybody trying to manipulate the system. I doubt CasinoGuru will help but if he did pursue it, it would be interesting to see how their arbitration concludes the matter.
Hello, I only use a phone and a computer. Whether the IPs are the same, I might not be able to know because I use a VPN. Then, the same betting pattern; what do you mean by "same"? If my betting is similar to another player, is that not allowed? If you believe I am cheating in my betting, please state it directly instead of accusing me with such a baseless excuse. Also, you're suggesting that the identity I registered is not genuine? Why are you claiming my identity is not real without even verifying it? I believe there are many shortcomings in how you handle these issues.
Even if we suppose you only have one account and the other 14 are not yours, there is still a term being breached: using VPN. And I somewhat doubt that their findings of those connected accounts are baseless and wrong, they tied the IP with device fingerprints, I think they're quite thorough with the investigation.
You can try to escalate this to CasinoGuru or other mediator where Shuffle can share their findings in private, thus validating it, but that'll be just a waste of time if their claim is true and you tried to cheat them, CG's representative can and will verify those findings and ruled in favor of the casino.