Hello Chumpon,
I'm sorry to hear you wish to cancel your service. I want to thank you for your past business with us.
Can I ask what made you decide to leave? We're always trying to make our service the best web hosting company it can be so I'd like to pass your comments along to our management team.
I hope you will reconsider us again when you need web hosting, you're a valued customer and we really do appreciate your business.