contract ending tomorrow

hi. I am using 東京電力パワーグリッド TEPCO for my electricity and my contract ends so they are cutting the electricity tomorrow. I had a really busy week so i thought i would give them a call at 5th oct since they gave me deadline till 6th. so i finally had a day off today so i try to give them a call and i realized they don’t operate on Sundays. and i have school tomorrow at 9. Can i still call them tomorrow at 9-ish and ask them for a contract renewal? or am i fkd up?

by monoxtokyo