I only said "keep on them" to encourage you not to wait. If they fix it now it might be a very simple thing, whereas if it shreds the outer cover or something you might end up waiting for parts etc.
The Vinyl covers are made by Watkins MFG - HotSpring - and are covered by a seperate warranty which comes with the spa. The warranty service is covered by the same dealer, and we get paid to take care of a cover the same as a spa or other item. When we deliver a 'fully loaded' tub we end up with a whole stack of warranty pages: the Ozone, Cover lift, Cover, Remote, Exterior light system, etc. all handled by the dealer through Watkins MFG.