no worries. hotlink facebook says this,

Hotlink: Due to system upgrade, all SMS sent (Hotlink to Maxis/Hotlink) are being charged wrongly for HotlinkYC & Activ10. This also affects customer who is subscribed to Supersavers. Rectification is in progress & refund will be provided in due time. Our apologies for the inconvenience caused.

they will refund.