UFONE msg sending failed!

since a week m facing msg sending failed very frequently specially when i m sending larger msgs to multiple recipients ! m based in Karachi Gulshan e Iqbal block 10 , any one facing this problem please share.

the msg centre number i m using is default that is +92333 000 5150

is there any other msg centre number for ufone so i could try that one too to rectify this headache ?

better contact help center.