Hi John , First I'm not apps savvy. Here are my thoughts on solving your unsuccess in cancelling installing an apps.
Have you powered
down the iPad all the way? If you did, how far is the closest Apple
store? I protect myself by not clicking anything that I'm not sure esp.
from the emails; sometimes I forget. To protect myself further, I use a
Chrome book for all financial transactions (such as trading stocks and
banking) exclusively - of course no emails.
I learn it the hard way. I clicked due to greed and curiosity. It took hold of my PC with ads. Even with all the software preventing viruses, I still do not want to use this PC for important transactions.