I tried doing a support thing to get the number for you just now, but the only options it gave me were web chat and email. I googled around and the number I found in multiple places was 1 (858) 790-7529, but not sure if it's changed since then. If you'd prefer webchat, you might just need to do a different category/question (https://support.na.square-enix.com/c...hp?id=496&la=1 on this form). For example, I put in account/billing for the category, then 'additional services' for the sub-category, and 'did not receive mogstation item' in the contact details, and it did bring up chat support as one of the options (but not the phone number for whatever reason).