Contact
There is no support desk.
Two people build this. Here is where each kind of message actually goes.
Pepiros is built by Anay Dhawan and Yash Kewlani. There is no dedicated inbox yet, and inventing one would be worse than saying so.
A bug, or a feature request
Open an issue on the repository. That is where the work is tracked, so it is the one route that will not get lost.
A security problem
Please do not open a public issue. The disclosure process is on the security page, which explains what to include and what to expect back.
Anything else
Discussions on the repository are open, and are read. Response times are honest rather than fast: this is a side project, built around other commitments.