Non-delivery of magazine

I have been a regular reader and a great fan of Open Source For You since I was in Standard 8. It would be great if you improve your delivery service as I have subscribed for the magazine for a two-year period, but it does not get delivered to me on a regular basis. In fact, earlier when I complained about this, I was sent two copies of ‘Electronics For You'! I am a computer science student and I need all