Hey @Emill you can delete contacts when you’re on the PRO subscription, so if they’re no longer of interest to your business, go ahead and delete them
I do suggest you try multi-channel approaches and getting the emails and WhatsApp number, so you can continue contacting them in the future.
Hey, @Emill
Welcome to Manychat 
Regarding your question, it is totally possible to control your number of contacts and you have two options:
- Manually delete your contacts
Go to contacts tab → select all the contacts you want to eliminate → bulk actions → delete contacts
- Create an automation that works every time a contact is created
You have two options:
Using Default Reply or creating a rule.
Using default reply:
Go to settings → select the channel you use → Default reply (choose “create new reply”)
There, you’ll need to create an automation that will delete your contacts automatically. Example:
When someone sends you a message → wait 2 days → delete contact
Using a rule:
Go to automations tab → select “rules” → New rule
Trigger: New contact
Action: Delete contact
Using this option, you can build a simple automation to wait some days before deleting the contact, if not the contact is deleted right away.
Once you use keywords, the second option (using a rule) is the best for your situation.
Let me know if this helps 
Hello Team, really appreciate the options and help that you provided to me! This definitely will help me to keep using and enjoying this amazing tool, Thank you!