Hi,
i wokred in the last 2 months on ransomewares, and trust me, you have a little chance to decrypte your files
what i can offer
-search a way to decrypte your files( hard but maybe there's if it's old ransomware)
-give you another solutions to back your files( i can back your files, but maybe not all the files)
you need to contact me asap to discuss more and to check the files
regards