I was automatically subscribed to this hours after I topped up my account

I did not register for any such subscription

Should I send the code for deactivation ?
Can i get my credit back in any way?

my account went from RM0.59 -> RM30.59 (topup) ->RM28.59

   

Thanks on the advice, I'm waiting to see if i get any response here first on what to do before i call or visit the center

Unlike the other guy who clearly forgot this isn't Kopitiam section