Babas

so i made some changes to my basic html/css that I had made I had it running before with php on heroku. when i made the changes I couldnt get it updated it wouldnt let me, so i tried redeploying it and the site went completely down. I have deleted the git repo and heroku site multiple times to redeploy it. I also made a completely different file to make the new git repo but github still recognizes it as the original and it wont work. I've been working on it for hours and can't seem to get it to work.