Once a withdrawal is confirmed on-chain, Sykka can't reverse or retrieve it. But a wrong-network transfer isn't always lost — it depends on where the funds went.
If you sent to a self-custody wallet you control
You may be able to access the funds yourself. Many wallets use the same address across compatible networks (for example, Ethereum, BNB Chain, Polygon and Arbitrum all share the same address format). Add the network you sent on to your wallet, and the funds should appear. If the wallet doesn't support that network, you'll need to import your private key or recovery phrase into a wallet that does.
If you sent to an exchange
Contact the exchange's support with the transaction hash (TXID), amount, and the network you used. Many exchanges can recover funds sent on an unsupported network to an address they control, though it may take time and some charge a fee. Whether they can help is their decision, not ours.
If you sent to a network with a completely different address format
If the transaction went through, the address exists on that network — but if no one controls it, the funds are unrecoverable.
Before you withdraw next time
Check which networks the destination supports for that coin, and select the same one in Sykka
Send a small test amount first to any new address
Be wary of anyone offering to recover lost crypto for a fee — this is a common scam