Has anyone been able to disable this automatic reply?
We will get back to you during our working hours — our team is always online during this time.

Hey, ​@Aishat and ​@Michelesg 

After the message, there is another message that says something like “Powered by Manychat”?
→ If so, go to your setting → select the channel where this is happening → check if the default reply has something.
→ If not, this was sent from another tool. Check the Meta business suite (https://business.facebook.com/latest/inbox/all) → Inbox → Automations → Check if there is any automation set (probably the “Away message”)

Let me know if this helps 🙂

Hey, ​@rodrigo_silvano. Thank you for your reply!

The message “Powered by Manychat” doesn’t appear after the text. Only: “We will get back to you during our working hours — our team is always online during this time.”

I thought it might be a setting in Meta Business Suite, but when I checked Inbox → Automations, there are no automations active (everything is off). And the default away message there is: “Thanks for your message. We're away and can't respond right now. We appreciate you reaching out.” So it’s a different message, which shows it’s not coming from Meta Business Suite.

When I go to Manychat → Settings → Channel → Instagram, there is no default reply created either.

I’ve checked everything in my Manychat account, but I still can’t figure out where this message comes from. It’s quite frustrating.

​@Michelesg if you’re using the free plan, that message is not from Manychat, because it always sends a message at the end saying “Powered by Manychat”. 
 

That said, you have to check which tools you have connected to your Instagram/Facebook to be able to understand where is the source.