University Tutor Meeting Transcription

I have a tutor meeting that I need transcribed it has two voices on it. It is approx 115mins long. The problem I have is that my dictaphone was playing up therefore I had to record on my phone which can only record 5mins at a time therefore I have one file which is approx. 40 mins long (from dictaphone and then 15 files which are 5 minutes long (they are all numbered in order). They are all MP3's. The deadline is Sunday the 11th of December.