As i saw on the link this is actually a serious claim against the site but there no solid proof in it and only the reports are just verbals and cant even show a solid proof even on screenshots which is somehow i could able to think that the problems is in yours only not to the site.
where there's smoke there's fire..
you dont need to full trust on it, but play with care. there are other places to bet so why try this one? i never heard of oshi and after seen this topic i will definitely not play there. and if you insist to play there, dont do big deposits. be safe.