Well ever since I donated to VIP, when I went to Prison I became D-Prisoner but I was A-Prisoner before that so when I got VIP I went to Prison and I was D-Prisoner but I could still walk into the A-Block! So I saved up 50k then I went to /warp ranks and clicked on C-Prisoner I was still D-Prisoner... Here's as much proof as I could get.
you should never have rebought C its a group glitch that wen u donate u lose the visible aspect of the miner rank but ur still that miner rank.