Change hosts while you still have a playerbase, they'll understand if you act soon, leave things with SS and they won't put up with shit servers and never come back.
You don't have enough access to fix issues with shared hosts or GSP, if you have a forum or website keep players informed that...
Survival Servers should be name Shite Services :p
I tried them once and still regret not getting a refund, they are total shite, they make Dayz.st and HFB look good and they're both useless as well.
For shared hosting Vert seem to have the best reviews, never tried them personally.
You greedy cunt :p
€40 for infistar when it's only €28 to buy and takes seconds to install, Chris (Infistar) offers top notch support and would install it for you.
All the other scripts are community made and released free, yet somehow you think you should profit from them ?
You don't quite...
I've no idea how/where you do backups, I use phpMyAdmin so i just export the files and then imported into my new server.
I changed the backed up file name to suit the new database name, worked first time, It seems a daunting task but is actully really simple :)