Greybeard, I am so glad that you've found Christ. At least HE will give you the peace that is beyond all understanding.
As far as why they haven't responded, me thinks they are having some trouble lately. If the influx of new members to JWN due to the "New Light" is any indication, people are dropping like flies! I wonder if this is why they haven't released anything about the new light in the magazine yet. Look at how many JWs found their way to this site, and the New Light has not even been published yet!!!
Your story breaks my heart. I can't even imagine getting an email from my son like you got. Please keep strong. The feeling of hopelessness and wanting to die will go away. But you have to give it time. Surround yourself with people that love you. I don't know if you do or not, but church is actually a great source for making friends. You don't have to believe it all. But at least there are people there that have faith and want to be around other Christians. Church is best for community.
Keep your head up, brother! This too shall pass. Give it some more time, and keep yourself busy. You may look back one day and see that God was working this entire time. Keep this scripture in mind as you keep up the "struggle":
Romans 8:28 - And we know that God causes everything to work together for the good of those who love God and are called according to his purpose for them.
vs 31-35: 31What then shall we say to these things? If God is for us, who is against us?32He who did not spare His own Son, but delivered Him over for us all, how will He not also with Him freely give us all things?33Who will bring a charge against God’s elect? God is the one who justifies;34who is the one who condemns? Christ Jesus is He who died, yes, rather who was raised, who is at the right hand of God, who also intercedes for us.35Who will separate us from the love of Christ? Will tribulation, or distress, or persecution, or famine, or nakedness, or peril, or sword?
37But in all these things we overwhelmingly conquer through Him who loved us.38For I am convinced that neither death, nor life, nor angels, nor principalities, nor things present, nor things to come, nor powers,39nor height, nor depth, nor any other created thing, will be able to separate us from the love of God, which is in Christ Jesus our Lord.