Contact
Myrrah is an app for iOS and Android.
Email tarkan.suravwrk@gmail.com. There is no support desk; there are two people, and this address reaches both.
Deleting your account
Profile → Your data → Delete my account.
Without the app, email that address from the one you sign in with and ask for your Myrrah account to be deleted. The privacy policy says exactly what is removed.
Reporting something
In the app, use Report on the person. Without the app, email the same address and say what you saw and where. Every report is read within 72 hours.