Garbage betcoin basically I ask under which law and legal rule a player is not allowed to play arbitrage or what kind of bets.Pomiyar quote the law letter by paragraph
There doesn't have to be a law that prohibits or allows it. If you check their terms of use, you will see that arbitrage betting is one activity
they consider fraudulent. What the law says, what you or me think, doesn't matter. Those terms are binding if you want to use Betcoin. If you think they are unfair, immoral, illogical, use a bookie that doesn't ban arbitrage betting.
Having said that, I am not defending Betcoin in this particular case nor do I know if the OP placed such bets. I am just explaining that if you use a specific service, you have to respect their rules or stop using it if you can't do it.
Why should I do it, with these low stakes? To win 1,50 Euro ??
You are talking about your overall profit taking into consideration betting on all possible outcomes. But Betcoin doesn't care what you wagered won/lost elsewhere. They only take into account the money you take from their wallets. And that's the wagers and amounts you showed in OP.
Does anyone have any other ideas what I could do? open a Case on SBR, or comment on their Facebook/Twitter posts that they are not paying out?
Commenting on Twitter won't get you your winnings, will it? You can file a complaint on Casino Guru and/or AskGamblers and see what they have to say. But according to my knowledge, one site doesn't deal with sports betting, while the other doesn't help when the matter is about term violations. They can, however, suggest other trusted services to turn to. Additionally, you can get in touch with their regulator
Gaming Services Provider N.V. from Curacao and ask them to assist with the matter.
If you believe you have a case against them, you will have to get active and knock on many doors. Start with the ones I mentioned above.