If like me the wording said you get a free Cobra MkIV (rather than the new wording that says you have access to buy it), you can log a support ticket. I did that and got a reply yesterday apologising for the wording not being clear and giving me the credits to be able to buy one, or whatever else I want to spend it on.
So try that and you will hopefully get the same response.

Dazza
So try that and you will hopefully get the same response.
Dazza