Can't redeem promotional gift card

I've been unable to redeem my $200 gift card reward for starting Verizon FiOS service. I've reached out to customer service (chat, phone, Twitter) multiple times, and still, nothing has been resolved even after being told tickets were created to resolve my issue. I'm getting frustrated that it's next to impossible to get an answer.

Re: Can't redeem promotional gift card

Hi navy7,

Your issue has been escalated to a Verizon agent. Please check your Private Messenger Inbox for a message from a Verizon Support agent. You can find your Inbox by clicking on your username at the top right corner of this page and then clicking the envelope icon that appears at the top of the menu. Response times may vary. Please continue to check your Inbox for a reply from a Verizon agent. Please direct all correspondence concerning your issue to the agents who will be assisting you privately.