okay, the servos will need to be fixed or replaced as stated before by my friend Skunkman!

they will have no bearing at all on the esc/motor problem as the power is not servo controlled!

you can check several things:

there is no damage to the esc

no damage to Rx

no damage to the battery

no damage to the motor

all connections into Rx are correct

the motor connections are secure and no bare part is connecting anything else

apart from all these, make sure you haven't adjusted your throttle range on the esc (easily done by connecting power to esc when you have the throttle stick in the high position, not sure if it's applicable to your esc but wouldn't hurt to research it!?)

go in and re-check the throttle curves and also, a very simple one, make sure you're not applying power with the idle-up sw (F mode) in the "1" position! in idle-up the curve should resemble a "V" so that you're getting higher power at either end when you're at max +/- pitch and then less power when the pitch is reduced to zero in the centre, when there is less drag/resistance. this might explain the blades spooling up when the throttle stick is at the low position!!??!!

let us know what you find

Matty