Unfortunately, you cannot cancel a Trust Wallet transaction(+1-415-780-2763) once it's been confirmed on the blockchain. https://writers.coverfly.com/projects/view/29453af7-f124-4a1d-9b3c-73584bfb8ec0/Policy_Can_you_cancel_a_trust_wallet_transaction_Trust_Wallet_RefundTrust_Wallet_Transaction_Troubleshooting