Unable to download any PS3 Files

Im new to all this. I was able to get Ps3hen working on my ps3 and im now searching for some games.

I've downloaded Last of Us, Elder Scrolls, Skate 3 and God of War none of them worked. I only downloaded one at a time, when one failed I tried the others to no avail.

Each time I download a 7z file, it'll download but then fail randomly and I'll have to spam the retry to get it to download (I'm on Firefox, and I disabled my adblock) when I try to extract the file (through Keta, I only have access to a Macbook) it fails. I've tried other methods to extract the files but still nothing. I believe the files are being corrupted during the downloading process, but I dont what else to try. (Keta isnt recognizing the files, and has them listed as unknown) (The files always seem to fail when they're close to finishing, around when there is only 10 mins left)

Has anyone had these issues or any new methods to try to bypass this?