I've used VPS6.net for over 2 years, until they terminated my service (they say it was accidentally, due to a billing software glitch).
When I contacted support about the issue, they apologised and offered to restore the service if I paid the difference to the current bigger price.
When I said no thank you and asked them to refund what was left of my advance payment, they recreated my VPS anyway, however since they had no backups and I was left to reconfigure and restore all data by myself.
Thanks but no thanks. I'll be taking my service to another provider.