Exchange wallets seem to want 20 confirmations or so for Linda.
If this is taking longer than 15-20 minutes, then you're doing something wrong or your exchange is the problem.
Im using coin exchange.io . Went to LINDA , deposit LINDA. GIves you a deposit address copy and pasted that into the wallet where you send from and seems to just be lost no sign of it. Mistake is probably at my end unsure where iv went wrong though. It says the transaction is unconfirmed in my wallet and the address matches the deposit address coinexchange.io gives me.
If it's still unconfirmed after all that time, maybe re-loading the blockchain would reset the state of the unconfirmed TX and allow you to resubmit it to the network?