Tag Heuer Kiriam - Watch keeps stopping

Question

My watch seems to be possessed! It tends to stop whenever it likes. Then I have to reset the time and it starts working fine. Also, it seems to be running slow, i.e. If I reset it for 1200 hours and at 1300 hours it run slower by around 5 minutes and shows only 1255 hours instead. I sent it to the authorised dealer and he told me that he had to change the equipment and it would cost me something like US $ 200/-! Is there any other way of addressing this problem? Thanks. Prashanth