How to get Fizz referral bonus after banking mishap?

I was referred to fizz from a friend and used the referral code to sign up. Unfortunately when I tried to pay by bill for the second month, I entered my banking info wrong, and the payment failed. I promptly fixed it, but since then, nether me or my friend have received the referral bonus for signing up.
Is it too late to fix this? Fizz is being unresponsive to my questions :(


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