how can I resolve an unconfirmed deposit to my blockchain.info wallet?
Every transaction has everything it needs to process, so you cannot really boost the priority of the transaction already on the network. If your transaction is not confirmed , i am assuming you have set low fees or there is unusual load on network, at current time of writing it does not look too bad. 

If you send another transaction with higher fees , it will get confirmed quicker and the earlier one will be removed from the pool at some point (or will get rejected as you will have already spent your inputs).*

*Assuming here you are trying to spend everything in the address.