the security is not listed for sale on an exchange.
in effect the odds on getting any of your money back is not good. it is task in itself to get any trade to occur.
I will caution again to contact your broker prior to selling any shares of REVO. I believe the company is now not DTC compliant. selling revo could cost you several hundred dollars in trade fee's.
to avoid continuing to accrue penny stock fee's that some brokers charge and any paper trade fee's you will need to utilize a penny for the lot form..