It cant really be repaired, has to be replaced.
Best to renew the timing belt and tensioners at the same time.
Phone a few garages for prices, dont take it to a dealer, they're too expensive.
Driving the car with a failing pump can cause the timing belt to snap or jump some teeth which will cause extensive (and expensive) damage to the engine.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.