I Corrupted my Web Server's File Transfer Account

I Signed up on biz.nf for free hosting a few days ago and while testing my scripts i accidently deleted a folder nammed ".." (dot - dot). After this mishappening , I am unable to create new folder or files or Upload something . Whenever i try to do so , i get the error as shown in the attatched image. Also Customer Support is only available to paid users , So no luck from the biz.nf team :(

Any Help Please?

Or if anyone could suggest me another good web hosting service for php . image can be viewed here ->