Support
Sangat is made by one person, and that person answers the mail — usually within a day or two. The address is justsudheerpaliwal@gmail.com, for everything.
Quick answers
The FAQ on the front page covers the common ones: what is free, how payment works, what the microphone does, which browsers are supported.
Bought Pro, but it is not showing?
Sangat Pro lives on your account, not on a device. Open Settings and sign in with the email you bought with — a six-digit code arrives by email, no password — and Pro follows. That works on the web, on an iPhone and on an Android phone alike. Bought inside a phone app? Sign in there first, or use "Restore purchases" on its Sangat Pro page; then the same email works everywhere.
If it still does not show, email with the address you paid with and it will be looked up.
Reporting a bug
Say which browser and device you were on and what you expected to happen — a screenshot helps. Sound problems are usually worth one extra detail: whether the tab was in the background at the time.
Everything else
Refunds take seven days and no questions. The privacy policy and terms are short and in plain language. For anything they do not cover — email.