No worries, just get the $500 cash shop package and open some Blue Boxes. You will surely be able to refine your weapon with a nice stack of Tender Stones. If for some unknown reason you are still incapable of refining your weapon, just spend another $70 on some Dragon Scales and Tears. You will have many more chances for failure on your weapon, basically a guarantee for maximum refine level.
What do you mean you cant refine past +4? Please check again if your credit card is still in your wallet. You must had forgotten taking it out.
No I don't, just trying make you guys understand that refiniment is not everything, and you shouldn't complain too much about it. It look pretty decent to me, except the +12.