Repair MP3 file

SanDisk MP3 players All other MP3 players
1

I have big problem in a lot of MP3 files downloaded from Internet and this personal folders very important to me , when I try open the mpeg layer 3 MP3 folder the voice come very noisy and high speed and I can’t hear any thing , I have the folder and the link , kindly help me to fix this issue and I can pay any charges you want , thanks