Quick Swipe Nightmare

I have a Galaxy A5 and I accidentally downloaded and installed a program called quick swipe over the Internet not through Google play. The effects have been close enough to that another poster but I haven't seen any obvious adverse performance issues. I have read and followed correctly (I think?) the advise given to the original poster. I found and 'removed' quick swipe but it was still running. It stayed to the side of the screen. I restarted the phone to see if it would go into effect then. Quick Swipe is as far as I can tell still operating fine with me having removed the application. I downloaded a malware detection software called Malwarebyte and ran a scan. It found no malware and offered no other solution. So I guess it may not actually be malware but it still bugs me that I can't get rid of it. I know I did something pretty dumb and I'm lucky it's not a lot worse. I will include pictures. Also in reply please use easy to understand lingo technology speaking. Any help will be greatly appreciated. Hope you can help and thanks in advance

 

Quick update. I can tell my device is suffering. It's overheating and battery is draining faster than normal with all applications off and the screen off