Involuntary Bump Compensation

I was recently involuntarily bumped from my flight as Frontier overbooked it. They sent me a link with compensation the next day but it required me to use a Debit Card with an expiry date, which I don't have (not common for us in Canada to have).

The link expired 3 days later and I've been since trying to get ahold of Frontier to get my comp. Have any of you had success getting your money after the 3 days? How'd you get your comp?