"Instagram could not be downloaded at this time. No matter how I try I am not able to download the app. Pls Help
That particular site could be temporarily out of service. I'd wait about 15 or 20 minutes and try again.  If that doesn't work I'd check using your iPhone if you have one. If you've downloaded Instagram once it should remember you and if you try a 2nd time the Get button on the link will become an Open button. See the image below from my iPad.