Just make your case together and address complaint about their breach in self-exclusion processes and get it reviewed by authorities. Be very specific what exactly happened in detail, in which order and add these all interactions with company to support it and their actions should be investigated.
Pay really attention to all details and put whole story to chronological order to make it easy as possible to 3rd party to understand in full what have happened. If they don't want to negotiate with you and have gave their final word, they for sure will try to use it against your claim as well.
Pay really attention to all details and put whole story to chronological order to make it easy as possible to 3rd party to understand in full what have happened. If they don't want to negotiate with you and have gave their final word, they for sure will try to use it against your claim as well.