Help My ZTE Blade s6 won't send pictures. nothing works!!! part 2

[problemchild1]

Last time I said that my phone wouldn't send pictures, it just said 'your account balance is too low'. Nothing I've done to fix the problem has worked, from deleting old texts to using handcent. And yes it was all paid for, I paid very recently. Well using handcent fixed the balance problem but now the picture is stuck on sending for eternity!!! I need help fixing this issue URGENTLY!!! This is really annoying for me and the people who have tried to help me as even adjusting the APN doesn't work. If necessary my carrier is: Three mobile.