Whether such a fault is usual is hard to say, but that it has survived the (1-year from original purchase date) warranty term before having a major problem, is unquestionable.
I don't think, unfortunately, that you can repair this sort of defect - *and* preserve the waterproof status of your camera. Digital cameras have very fine parts, require fine tools and a delicate experienced touch, and anything in the optics is particularly delicate. Self-repair can be done in some cases for some kinds of problems, but only if there is adequate instructions of the highest quality available for precisely the same model. In this case, for this model, I am not sure that there are such instructions.
This is the one address found anywhere near your location, for a Panasonic digital camera repair facility:
Professional Electronics***** Unit 10
Mississauga, ON L4W 4J5, Canada
Their telephone # ***** ***** or(###) ###-####br />
Their email: *****@******.***
Hours: Monday to Friday: 8:30 am to 5:00 pm (EST)