I use iPad how do you enter codes on iPad. There is no control alt del

I even uninstalled and reinstalled it. Still the same. It shows I have more core units available but the purchase button won't light up our activate and I have plenty of prestige. So sad

Thanks for thoughts. I guess I didn't explain it we'll enough. I can't purchase new equipment. After each scenario, when I go to the placement of equipment, the purchase button is not functioning, it's not even highlighted. So if I start with a core of 8 units that's what I get for the whole campaig...

First of all, I love this game, now though I'm having a tech issue. When I play in campaign, after the game is won and I move on to the next scenario, my units don't increase in number. So as I advance in the campaign I still have the original number of units. This just started today the last week i...