I agree, it's very important to find a RIGHT physio!! In Italy I have treated these type of problems and I think that the Kegel's exercises are very useful to improve the correct pelvic muscles' neuro-muscular control (it's also important strengthen the abdominal muscle but be careful to the activation, it has been right coordinated with the pelvic floor muscles).
Most likely this patient has also a urge incontinence (due to a bad adaptation of the bladder's muscle) and to treat this problem the best actually approach is the endo-anal electrical stimulation (the magnetic chair or body-vibration could be used such as a "maintenance").
At home the patient could use the "Stoller's technique" but he needs of a electrical stimulator.
Best regards
Agostino
P.S.: sorry for my english