Help with the rules

Hi, We play a college league in my country. But we have a problem. Enemy team is randomly chosen and we have a week to fight them best of three. The opponent team had a week to contact us and set time to yesterday. But they didn't show up. The problem is that our league rules do not count with possibility of abusing this. If the administrator set the time beforehand it would be easier. But since its up to team captains we can't really do anything about. Is there any official rule about this? Can you post me a source please?
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