Claiming powerball winnings using MOMO

I played ITHUBA powerball via momo app money was taken from me account I received an sms confirmation with the numbers that I played I WON crediting money is a problem . Agents are clueless and can't explain 1 of them gave me tymbanks number the other hung up.... HOW CAN I CLAIM MY LOTTO WINNINGS USING MOMO?