Whats with safaricom?

They tell me i do not have sufficient funds. I load Ksh 250, then they tell me in the sms ,You have Ksh 268 balance (as in they were hiding the 18 bob????)

Now they tell me i dont have insufficient fund so i should okoa jahazi, I try to and they tell me I dont qualify ( because my account is not at 0) But when I try send an sms or call they say its empty....

Sasa hawa watu????What is happening?