Wheel Bearings

Hello, My name is Amanda Kunz. I'm 17 I Have a 1996 Toyota Corolla DX. It's the best car ever, by the way, other than the fact that the wheel bearing has gone out every 2-3months. This car was my dad's (He was a mechanic, he passed away last year.) He put in 2 new bearings before he passed away and he got a life-time guarantee/supply of them. So when It went out the first time I got a free one. It went out again 3 months later so I thought, well, maybe those bearings are crappy ones, because they were free. So I went and bought bearings from a toyota dealership place. Well they went out again(2 months later) and then I got them done again and everyone is telling me different things. Someone told me I needed to get the car allign, so I did and it went out a month later. Ah I cant sell the car but no matter where I take it. Les schwad, toyota, midas they will not tell me or they tell me the wrong thing and I already put so much money in the car. Help ME PLEASE! I cant sell the car! Its the only thing left of my dads! I think a lot of the mechanics are telling me things to get my money because Im only 17. So.I really n eed help