24 hour fitness midtown houston, (louisiana st) overcharged, fraud houston, Texas

ok so me and my younger bro sigh up for membership, and are told that we will be paying 24.99 a month (each)    so the day we were there he tells us he's gonna charge us $80.00 (each) , i asked for what? he said 1st month, last month, and 30.00 initiation fees, so he charges us 80.00 each, ok so when the next month comes, we both are automatically charged $40.00 each, i go to a location nearby and tell the mgr to check my account, and he says u were charged correctly, your membership was 40.00 each month!?? i told him, that when i signed up it was 24.99 eac, he says sorry we cant help u with that.   what the h*lll!!!?     so we are now being charged $40.00 each month??! (each)   total of 80.00 just for sport membership!!!?? please someone help meee!