Not able to offer a direct solution though there may be some possibilities - the following link for example:
https

/www.bugsfighter.com/remove-zepto-ransomware-decrypt-zepto-files/
For the most part I recommend avoiding any downloads that offer to provide a fix in the form of decryption or other recovery. No way to really know if the download is 1) legitimate, and 2) effective. Some of those websites appear no matter what problem you are researching.....
Google words such as "Zepto decryption recovery" and look for recent links addressing the problem. Especially any links that are associated with a known AV company and can be verified as such. Someone may have found or will find a fix. Again be cautious.
In the meantime...