If you want to change the Thai massage is the massage oil you have to pay additional six hundred baht and you do not have a discount coupon, because you get the discount price.
If you want to change Thailand's massage, oil massage, you must pay an additional six hundred baht and you will not get the discount. If you have a discount coupon from the hotel.
If you want to change the Massage Thai massage oil, you have to pay an additional six hundred baht, and you are not the reduction. Because you have a coupon discount prices from the hotel.