I remember watching Voltes V on GMA 7 when I was 3 to 4 years old before August 22, Sunday in 1999 every Friday at 7:30 pm. I enjoyed the English dub episodes until July of that year.

I have the complete series on VCD. I grew up watching these with Mazinger Z back in the Philippines. I got it from ebay. I think Japan already have it out in DVD.

why isn't this released on DVD yet?

That's really good for an 80s era cartoon