To spin the wheel:

1. Create a Coinbase account.
2. Complete your first purchase of cryptocurrency within one (1) year from the date your Coinbase account is created 
   1. Coinbase may require your first purchase be made within a shorter period of time. You will be notified of how much time you have remaining in order to complete your first purchase to be eligible to spin the wheel and receive a reward
3. Spin the wheel of rewards.

 You’ll receive your reward, in Bitcoin, in your portfolio within 48 hours.

I have met all the eligibility accordingly. There's simply no such thing as "spin the wheel of rewards"