FNB FAILING TO PROVIDE MY AIRTIME 2 TIMES!VODS

Last week friday I bought R150 mtn airtime, money was deducted from my account but I never received the airtime. On monday I went to FNB Ghandi Square they said I must call online banking and I was told that mtn it's the one with network problem. I called mtn on the following day I was told that I must go to the bank and call while I am there. Today I bought telkom airtime R30, the money was deducted from my account and I haven't received the airtime.