Seeking information on Ferry service to Kythera

I learned recently that Mirtidiotissa struck a reef and is out of service. Since It is the only boat I am aware of that sails to the island, I am concerned. I plan to atempt to sail to the island around the 28th of September, if possible.
I understand that there are other boats available, but have been unable to get detailed information on schedules, etc. I learned that a boat on the Hellis Lines, Express Pegasus is going to the island and another called Porfyrous.
Can anyone give me details on schedules, etc. I would greatly appreciate it.
I have left a message with Porfyra Travel but have heard nothering as yet.
Thank you for your assistance
Nick Sofios