Regarding Mega:
If they are targetting you based on your IP. Why can't you change the IP and try again? Is this account-related or IP-related. If IP-related, we can try some files and see if it is working or now.
The fact is, Mega is super fast and has smaller restrictions (which can be bypassed by various methods like mega bastard and so.)
Torrenting is a good idea & old traditional one which still works, but the main problem will be the leechers. Users will just download and they won't seed it. Most people won't seed it, which makes us difficult for the users who need it.
There are some sites like fileupload, send.cm which has a good downloading experience, but make sure it matches your revenue model.