Was the telegram bot asking you to enter your private key or you entered it on your own by mistake ? If it's the first case, then you might report the bot so others don't fall for this.

The immediate action that you must take is to transfer ~all (Leave few $ to save for gas for tokens you would receive in future)  the funds to a newly generated wallet.

As you are enrolled in different campaigns, you must request the bounty managers to change your ETH address in the spreadsheets before the payment is sent. If they refuse and you have to check frequently your address balance and transfer any new tokens you receive immediately to your new wallet.