My Number used by someone else. Call center doesn't care to assist

So I tried registering on Holywood bets for some fun. Got a message from the system that said my number is already in use. So I followed prompts and sent my fica docs to a mail adress that doesn't work anymore. Today I called their call center. A guy asked me for my name and stated that my name is not the name registered with the number. I told him yes, someone used my number, so how can we rectify te situation. He said I need to get a new number... I told him that my number had been rica'd on my name since 2010, and that I can submit proof, and that I'm LITERALLY calling him from said number. He again said I need to get a new number. I told him so, what you're telling me is, I can literally take anyone's number and register it on your site and that person will never be able to get in? I then told him holywood bets it not secure anyway in that case as this can be done to anyone. He didn't want to help. I wanted to spend money. It is what it is. If you're reading this review, someone can just use your number and you won't get in if you don't go and get a new number. I also told him I'm in management and that subordinates often use my number when doing things like making debt etc. He wasn't interested in assisting to get me registered.