Wrong Rewards Meat vs Metal

After the Meat vs Metal event, I should have received the Tier 1 reward. Today I entered the game and they only gave me the Tier 5 reward. I would appreciate if you could review the rewards and provide a solution, thank you.

The rewards you get are random, getting higher in the rewards track only improves the odds you will get a high tier reward. You can actually check the odds on the I icon.

Tier 5 is pretty unlucky for max track though, average is usually tier 3