downloaded microsoft office plus in pc format instead of mac, help?

I accidently downloaded microsoft office plus for pc instead of mac. I purchased it online, and it won't let me go back online to download the mac version. ( I downloaded microsoft office plus through military) therefore it was discounted and can only be purchased once so it wont even let me click on the mac version Can you convert it from pc(exe.) to mac? I tried the apps izip etc but none seem to work.