They all have apps these days, and just like a local bookmaker might "accidentally" remove your name from their legally required self-ban list it's very common that a "bug" in your phone app means you can keep gambling after saying you want to stop.

"Mistakes" in the controlling party's favour are extremely common in such industries. Fluke 100-1 sport betting win? Oops we forget to fill out that mandatory anti-fraud paperwork, bet is off. Lost that 3-2 bet that the favourite would place in a horse race but actually you didn't show proper ID? Sorry that's your problem, we're keeping the money