I purchased 250 MCAP on 12/5/2017. The "Transactions" section of BGF shows that transaction with id 465023. I tried to sell MCAP but was not successful as usual. However, now the MCAPs, which were removed from my wallet and were lined up for sale on the exchange, are not showing anywhere. Wallet shows 0 MCAP and exchange is not there to provide any info about the MCAPs. What should I do?