SO . UPDATE :
The arb betting accusations dropped finally -which was ridiculous all the way- and they returned back to value betting narrative which is not illegal even according to their terms.
It is good that they have returned the original amount though the demand of you is the winning amount. Hence I would like to tell you that you should be satisfied with it and lock the thread. As they would lock all the fund for breaking their rule but they are so cordial and returned the amount and their final decision is to stop business with you.