When you have a specific complaint,your first option is to contact this casino’s help desk. Every casino has its own complaint procedure and a good casino will do anything to keep its customers happy. Make sure you document and analyse your complaint properly. Make screenshots if possible and, if you need to, record a conversation.
Would you rather make a complaint anonymously or make a complaint at an external organization? In that case, there are a lot of options. You can, for instance, go to the Lotteries and Gaming Authority of Malta. Always make sure to make your complaint in clear English and deliver some proof.