Camera lens stuck!
First i would let you know that the Brand Vivitar is one of low quality cameras, it's sad but it's true.
Now regarding the issue that you have with the lens, you probably drop it because this the only way to have the lens stuck. but anyway, to repair it it will cost you more than a new one. and again i suggest to buy a branded camera like Canon,Sony,Nikon,Panasonic ... these are top quality cameras and you will not have any problem for life except if you drop it ;)