Those pics helped a lot. Too broad to be sp. Dabola. I would say Black volta endlicheri without a doubt.
This is Kha's black volta. Very similar. Pattern is similar to sp. Dabola but has more of an endlicheri head.
It has the longitudinal bar that stops when the vertical broken bars start. Not all black voltas look like this, but because thats what it was sold to you as and there is another black volta that looks similar, thats where i would put my money.
I'm leaning toward red volta endli. Since the stripes are not as thick and solid like mine black volta and other ones that I saw. Recently I purchased a "black volta" endli, but turned out to be a "red volta" endli. The stripes thinner and it looks like the OP's endli. Will get some pics later today