2001 Ford Fiesta Tyre rubs on wheel arch.

I hit the curb going about 20 mph and it seems to have done something to my front wheel. The tyre is now right up in the wheel arch and rubs really bad and cant drive it . The other wheels are ok and i've heard it might be a problem with the lower arm or something.... Does anyone know what the problem might be and no how much its going to cost to fix or what parts i need to buy and how much labour would be??? (ford fiesta 2001 3 door)

Thanks.