Not sure. I downloaded Ramlethal's also and that one worked. Wonder if Faust's voice pack has I-No's.
Here's my PSN Live Support thing:
Guillermo: Hello, My name is Guillermo how may I assist you today?
Usted: Hi, I'm having a problem with some DLC I purchased for the game Guilty Gear Xrd: Sign
Guillermo: I see, I'll be more than happy to assist you today, can you please tell me what is happening with the DLC XXXX?
Usted: One of the items is wrongly named and I purchased it thinking it was what it was to find it was a different voice pack
Guillermo: I see, I will create the refund case for you, in the meantime let me provide you with some information.
Guillermo: According to the PlayStation User Agreement all sales are final, but I will be happy to submit a case to be reviewed for a loyal consumer. It will take around 3 to 5 business days and once approved the funds will go back to your wallet
Guillermo: Is your email address associated with your PSN account still valid?
Usted: yes, and may I say that I've been on some forums to find other people are having the same problem. The voice pack is the "I-No System Voice". Once you go into the game it's a different one.
Guillermo: I understand XXXX, can you please provide me with the online and sign in ID for your PSN account?
Usted: XXXX XXXXX
Guillermo: please allow me to get this request going for you.
Usted: sure thing, thanks.
Guillermo: Alright, XXXX, I just submitted the case for you.
Guillermo: Here is the case number for your request: XXXXXXXX, please allow the next 3 to 5 business days in order to have an answer from our refund reviewing team
Guillermo: Is there anything else I can assist you with today?
Usted: I guess not, thank you.
Edit: Just realized mine was in spanish Lol. Not sure why, he was typing in english though xD