Well I asked some members of M, and most of them weren't even there. The time was agreed to be at 3pm GMT and M failed to show up. However seeing how InC does not seem to agree with this rule, I'll give them a simple choice:
1) Count it as a victory by default and move on with 2 points added and 1 point subtracted from M.
2) Do the match before this Sunday (and yes in that case the 5th round will be delayed a bit).
If you do choose the second option, then start organizing now. Don't wait till it's Friday to start organizing a simple time and date. Also bare in mind that you have to get a good time zone for both teams, and I know for fact that M members did not like 3pm GMT.
Anyway, it's up to the teamleader of InC.