Nestaway Technologies — not contacting property owner and no rent!

It's covid situation, but all companies working online. We have 2 properties registered with nestaway. They are taking advantage of this situation and not contacting us at all we tried through fb, through tenants and their sales managers too. All tenants have vacated in one apartment and we have no clue about other. Atleast in order that we can try to keep our own tenant. We are try to communicate with nestaway. They are not giving us rent, whereas the tenant has paid to nestaway. Not communicate is a way of escape to give rent or cut away/ settle with them. We are stuck with our property under them.