None of the things Danny requested required coding or programming. Everything was incredibly basic and rudimentary and would apply no matter what theme or framework you used. I completely understand if you're frustrated and upset. I would be too, but please realize that frustration is with the condition, not the help we are trying to provide.
To get a PHP info file, call your host and ask them for it if you're uncomfortable creating and uploading a file. They should be able to do this for you quite easily.
Let me say, in response to your statement about many who've posted here in the forum about slow sites that this issue is not PageLines but servers. Most of those who've experienced this condition have used incredibly inexpensive and resource-poor hosting which doesn't provide the necessary minimums for speedy processing.
Candidly, I've experienced this problem myself and through trial, error and investigation, discovered that the traffic to my site increased, pulling more resources than available. I ultimately had to get the host to increase the resources by migrating my account to a bigger, better one.
I assure you that Simon, Danny and Jenny are trying very hard to help you but they need to see certain settings and conditions to determine how best to point you in the right direction. Since you're unable to provide screenshots, I'll provide you with a generic set of simply instructions that should help.
1. Call your host and ask them what the available RAM is for PHP processing.
2. If the number is less than 64 MegaBytes (Mb), kindly ask them to increase those resources to a minimum of 64Mb, but preferably 128Mb.
3. If they refuse or make excuses, contact Bluehost or WP-Engine, which have WordPress ready servers capable of handling your account. They could even help with migration. Any host who refuses or makes excuses for that request doesn't, quite honestly, deserve your business.
WordPress itself uses many PHP resources - these are the things it processes, like posts, pages, blog pages, etc. Admittedly, PageLines does add more processes as will any other framework because we use things like sections, custom post types, etc. That's why when changing to default themes, the speed picks up. But then, you get much less.
If you put it in the context of a car, you only need regular gasoline to run a Chevy or a Toyota. But if you're going to drive that candy red Ferrari or the racing green Lotus, then you need premium gasoline. Liken that gasoline to the RAM available. Less than 32Mb and you're running on fumes. Soon, you'll run out of gasoline and the site will stop or slow down to a crawl.
There is a learning curve for absolutely any theme or framework, and indeed, for WordPress itself. If you still desire a refund, please write to firstname.lastname@example.org as these are not processed through the forum.
I hope this helps to alleviate some of your speed issues and concerns.