Question for Gateway Communications Nigeria

Please money has withdrew from my account with gtbank ******** to gateway+m lekki phase 1 NG, which I didn't initiate such transaction. This transaction toke place on 16-11-18 time 8pm, amount is 3700 naira, please I need my money back this is fraut. Please I will have no option left but to report to my bank and take legal action. Please help me identify this frouters and revact my money. Thank your Anthony E.