If you are referring an exchange for Zcash (ZEC) go here https://coinmarketcap.com/currencies/zcash/#markets just ignore yobit, and you can use HiitBTC or Bithumb since currently Binance, Bittrex and Polo is not accepting new registrations. Once they activate the registration then its recommended to use them instead. Always use 2FA for extra security of your account

Well yeah, you're lucky enough if they respond in just a single week.
But anyway I wonder if why you use this exchange while there are so many exchanges that's much better than yobit.