Please help me to solve unconfirmed transaction
Patience grasshopper!  According to 21's block confirmation estimator with your 10.21 sat/byte fee your tx will likely confirm in the next ~3-32 blocks.  For future reference though, if you would like to add a higher fee check into using recently added RBF (Replace By Fee) functionality that was recently added to bitcoin core and multiple wallets.  Here is a bitcointalk thread that discusses this at length for numerous wallet clients:
https://bitcointalk.org/index.php?topic=1802212.0