Need a slideshow video made. I've already got slides and audio

URGENT need ASAP

I've been trying to make a power point presentation today with recorded audio.

I have made a slideshow with powerpoint and recorded the timings of each slide.

I have made a separate audio mp3 file.

All I need is someone to put the two together asap to make a video that I can play on my iphone.

In trying to do this myself I have accidently added audio to 2 of the slides and don't know how to undo this.

I think this will be a very quick job for someone who knows how to do it.

Thank you. I've spent far too long on this job!