Hey kamlesh01,
Thanks for reaching out and I am sorry to hear about the issue you ran into.
There has been temporary degradation on the day of your contact , which has been resolved not long after, and therefore may have been very well the reason you were experiencing this.
If issue persists, just as CrockfordCK suggested, let us know what happens when you attempt to download the update as well as whether you happen to receive any error messages at all, and we will get back to you accordingly!