Discount is reflected during signup on a per day use.
You get your first 7 days free of charge. Your first daily charge will commence from day 8 and discount is applied for the following 30 days.
https://residential.launtel.net.au/residential/disccode/L4UN…
Additional $25 credit available with referral signup.
almost the same thing happened to me, try to cancel the direct debit agreement but no way to do so. called / live chatted, no way to do either, schedule for cancellation 30 days from now and I'm back with Launtel, yey!