I am level four vampire stage right now but I cannot feed on anyone because of a glitch. The feed option simply does not appear even when I am sneaking or bring up the pickpocket thingy. Cant progress through the game because always getting attacked. But I still want to be a vampire whats the command to set myself back at stage one?

Are they going to fix this?

i dont know of any command for that. You may have to get cured, then reinfected.