Whether there was krausen or not is not important. You had fermentation, but at less than ideal conditions. In the U.S. 4 packs of yeast would be about $28-32 US. You should be able to make a starter for much less and have a better fermentation with it. Let it ferment and it will end up as beer, but may not be perfect. Many use refrigerators to control temperature, or ferment in the basement where it is cooler, or you can look up "swamp cooler" on here and find lots of ideas to control fermentation temperature.