There's no phone number to call. To download a Pro installer you need to have bought Pro from the official site Lime Wire » Official Website & Free Download, BitTorrent « (vendor on your CC statement is LimeWire LLC) & still have current Pro benefits...that means that if you bought Pro with (for example) 6 months worth of updates & support, it needs to be less than 6 months since you bought Pro.

If you did buy from the official site, within the timeframe specified, just go to the page below & enter your old email address...it makes no difference whether you use that address any more or not.
Lime Wire » LimeWire PRO Lookup

If you bought Pro from a scam site, or if your Pro benefits are out of date, your email address won't be recognised because it won't be in the database.