Another possible source of help:
Did you buy it from Amazon? These days they have some very good after-sales service - I bought a 'smart' phone which went kaput, told them I wanted to return it, their service dept got in touch and talked me through fixing it. As it happens, they couldn't, and gave me a full refund instead - all this six+ weeks after purchase.
Anyway, only applicable if you bought through Amazon. Otherwise try Canon (sometimes helpful) or the retailer you DID buy it from.