Please help me.!!!

I want to travel Kowloon to Shenzhen to catch a flight 13.15 on a Thursdy in October. Timetables show ferries do Lowloon to Shenzhen yet ferry company tells me they don't do this route any more.
Can someone tell me what ferries run from Kowloon, what time do they depart to get me to Shenzhen for my flight check in, where do I catch the ferry.
Should I not consider the ferry & take a bus instead, if so is there a bus from Hong Kong island as we are staying at North Point, where do we catch it & when should we catch it for the intended departure of 13.15