Hi, Got a letter for NHC, the date I book for my trip is the same date as my NHC check-up, called the CMPB number keep on inbox full, then called the other number and it says its not in my records. will call back in 3-5 workings days.. My question is will they called back or not and I already requested to change.. so is it possible to change? then why the last time before I went checkup don't have this kind of problem but now when go back for 2nd time got this type of problem ah? 
