No you paid money to get the 50 atlantis coins.
You don’t get the contents of the Goblin Balloon or Goblin crates UNLESS you purchase them via the goblin balloon.
The free option is to recycle the Goblin Balloon when there are 5x Crates in the Balloon’s Hold
Read more about it here:
[Master] Goblin Balloon -- Explanation & Loot Tracking