Smallcase charging without my knowledge

I have an SIP going on in the “Timeless Asset Allocation” smallcase. The app shows this SmallCase as Free Access. Today, while checking my Zerodha ledger, I noticed debits of ₹11.80 per month. Description mentioned in ledger is “Being small case fee for x date”. What is this charge? I do not remember agreeing to any such debit, and smallcase clearly mentions as free? What dark patter is this!