Can't call specific (ported) phone number

I have a Canadian Vonage account with a ported phone number from a Canadian cell phone carrier.  My Verizon prepaid Gusto 2 can call any other number I've tried (Canadian and American) and can now finally (after several calls) make and receive calls while roaming in Canada, except to my Vonage phone.  The Vonage phone works just fine otherwise, so I contacted Vonage and they replied that Verizon needs to completely remove the Vonage phone number (ported from a Canadian cell phone company - Fido) from Verizon's database(s).  Who do I call/email to get this taken care of, does anyone know?  It's very important that my Verizon phone be able to reach my (home) Vonage phone.  I haven't tested with any other Verizon phones as I don't have any or know anyone with a Verizon phone. 

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Re: Can't call specific (ported) phone number
Customer Service Rep
We want your prepaid Gusto device to be able to call all numbers tru5tno1! While we do not have access to prepaid accounts, our prepaid customer service team will be able to assist you further. Please contact them at 888-294-6804 at your convenience.  AntonioC_VZW  Follow us on Twitter @VZWSupport  If my response answered your question please click the "Correct Answer" button under my response. This ensures others can benefit from our conversation. Thanks in advance for your help with this!!