Can't be exchanged back, what to do?

Binance Wallet Hemi Phase 1 Booster Task Tutorial
(Deterioration ≈ 3U Expected Reward ≈ 15U)
A total of 4 tasks Preparation: 80USDC + ≈2U equivalent of ETH (mention one of Base, Op, Arb networks)

Task
1⃣
Follow Twitter Retweet Twitter

Task
2⃣
Cross-chain USDC and ETH to Hemi (using Stargate)

1: Open Stargate and select your source network (the chain where USDC is located)
Target network select Hemi
2: When crossing USDC:
Top right corner Advanced settings → Set Gas on destination to None.
Bottom Route: Default Stargate V2 Fast (about 2U), switch to Stargate V2 Economy (about 0.7U), saving 1.7U in gas fees.
After setting, input 80 USDC for cross-chain.
When crossing ETH:
Also change the default Fast to Economy (≈ $0.7) in Route.
Cross a small amount of ETH to Hemi (approximately 2U equivalent) for subsequent gas on the Hemi chain.

Task
3⃣
Deposit 0.0003 hemiBTC in Spectra

1: In Binance Wallet → Discover search for Sushi switch to Hemi network
Use about 70 USDC to exchange for 0.0006 hemiBTC
(The subsequent tasks 3 and 4 share: each use 0.0003)
2: Open Spectra:
Select asset hemiBTC, input 0.0003.
First click Approve, then click Supply.
A total of two transactions (two gas). After depositing, hold for ≥ 24 hours to complete.
24 hours later, verify success and withdraw, then exchange back to USDC using Sushi.

Task
4⃣
Deposit 0.0003 hemiBTC in Gearbox

Open Gearbox, select hemiBTC, input 0.0003
First Approve, then Supply, also two transactions.