Hi,
Thanks for replying.
As of now, our application has a small user base but considering its growth rate and interest shown by our users, we are sure that we are going to need elevation. Considering the future prospects, we applied for elevated POST access.
To apply for the elevation, we followed the steps which are mentioned by you in the below link:
But, we did not receive any response from Twitter except and auto generated email from support@twitter.com.
Please let us know if we need to reply on that email, submit the form again or wait till we have a decent user base.
We can share the content of the email which was sent to us by support@twitter.com, if required.