I would just use a fake phone number in your CR account, if that's what it takes - I would never expect CR to make an international call to contact someone outside of the US if there is some issue with an order, just as I would never expect AL or AOL in the UK to ever call me on the phone here in the US. All my correspondence with overseas anime retailers is done through their contact page or through email. That's just the norm, I would think. Pretty sure Crunchyroll would never even call someone domestically in the US for an order issue - I've never heard of that happening even once.