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I assume you were on a 300, and if it's any consolation, it gets just as hot in the front, there literally is nothing the crew can do - yes, window blinds would help in this situation, but alas, we don't have them.
The efficiency of the packs on the -300 is irrelevant if the SOP is to not have the APU running! As for heat in the front, try turning off the window heat.