SSL Certificate expired, no automatic renew?

Dear Friends,

I am using wpmudev hosting and my certificates on all domains of one of the servers hase expired without automatic renewing. Do I need to do something or should it be renewed automaticaly? What shal I do to renew the certificates?

The domains are: https://www.aps-web.cz, https://www.ekomona.cz, https://www.hlinna.cz, https://www.dobulharskakmori.cz, https://www.foudova.cz, https://www.masaze-litomerice.cz and some others. It is WPMU installation with the primary domain aps-web.cz.

Thank you very much for your help.

Luhas