Help bmw m3 e46 smg expert in Hong Kong needed

[Jonathanb48]

Hi I have an 05 m3 with an smg box which only has 50k on the clock and is imported from the uk ( by me). The smg box has started flipping into neutral which is a known issue. I am looking fr a mechanic who really knows the smg box in Hong Kong as my present guy seems to want to fund his next three years holidays without fixing the problem but replacing every part . Appreciate any help.

Kind regards

J