Incompetence of MTN. Where is the airtime I've paid for TWICE

How pathetic is MTN. I have paid twice this morning on the MTN website for airtime. Each time I received confirmation from my bank that the money went off my account plus an email from MTN confirming receipt of the money. Yet it is not showing on my MTN account. When I phoned MTN they couldn't even assist me with all kinds of excuses that are completely irrelevant to the case. I feel helpless and completely frustrated at the incompetence of "service" staff. It feels like everything is falling apart and no one capable to help whatsoever. Your money gets taken but you get ZERO in return. What must I do??????????????????????