As I understand it, the adjudicator's decision may be sent either by post or by email depending upon the method chosen by the appellant.
Have you contacted the Tribunal to ask?
In any event, you knew when your case was coming into the adjudicators' list and therefore when you could expect a response.
Decision entered into register 28 Jan. CC 7 March.
Did you not contact the Tribunal or check on the status of your case in over a month?