Huawei — honor india is not fulfilling their order

I have pre-booked honor view 20 smartphone on 11th january 2019 with purchase of rs. 1000/- coupon. According to that i have to purchase the smartphone before 7th february 2019 and redeem the coupon. But their website is not opening the page and the customer care person told me that their website is upgrading so i won't be able to make the purchase and upgrade will take approximately a month so i won't be able to purchase the phone and my amount will be refunded. This problem occurred on 1st feb 2019 and phone launched just couple of days before that. So what's the meaning of pre-book if they can't fulfill it?