a lot of reputable accounts have been spam reported, and the telegram scam service is still very new, pretty sure if you get scam reported 5+ times, telegram automatically gives you the scam tag, and you need to contact their bot, or their support. Fairly easy to clear up.
Then they shouldn't label it as "scam" right away if it automatically appears after X amount of reports since it can be abused. They even said the scam label is used for suspicious accounts which is not right as suspicious doesn't necessarily mean scam.
UPDATE: We got our scam label removed, thanks for all the help. For anyone facing a similar issue, you just need to message @botsupport, they did some kind of verification and all good now 
What kind of information was asked in the verification?