Blockcypher explorer gave me internal error for all the calls, so I cannot verify there. All the other block explorers I've tried cannot find that transaction, meaning that it was either dropped, either never sent (somebody was lying to you).

However, can you please confirm you are talking about Bitcoin transactions? Since until now you've just left us assume it's that. Can you also tell where these transactions were supposed to be sent from?
For now it looks like you've been lied and no transaction was sent, also clearly no bitcoin transaction is stuck.