What a useless airline

What a useless airline!!!! I booked flights for my daughter and a person accompanying her to durbn, i reserved and paid for the seats. On check in they gave my 3 year old daughter a different seat from the person accompanying her even though i paid and reserved seats in time, i call them trying to lodge a complaint i am taken from pillar to post i have never experienced this nonsense with mango airline i will never!!! Never!!!! Book with this useless airline