Sorry to hear this.
If the Master Password you have (the existing one before you lost the access), and if not yet changed then the previous version of the Master Password if you have, then it is possible to recover. Otherwise not possible.
Just one question-- You did not keep a copy off-line?? By writing in your hard copy, diary, etc. It is always advised to keep a copy off-line and that is not just true for Steem rather for all Blockchains.
Actually my phone isn't working properly and all the data got lost so i am unable to recover any key i don't have any key except posting key friend please help me .
You can recover the data of your phone, try consulting with an expert, it is possible.
In the context of Steem Blockchain, the recovery algorithm is designed in a way that your master password(existing) is required before you lost access.
Should i create new account friend?
If you want to, you can.
Let us confirm from @steemcurator01 that should i repost all my diary posts in that new account as i am in urgent need of money for my medical treatment.