Zoho mail shared group contacts

Zoho mail shared group contacts

First I like to say that I have been contacting support numerous times via phone and email for some weeks now with no response. I am a paid zoho mail and books customer and very disappointed to say the least with the support. I have not received one answer, phone call or email from you to even look into the problem.  

Problem:
When creating a group to share contacts and documents etc. in zoho mail it will create the group and also show the group members. On the top tab selection in contacts you can add from your contacts the contacts you like to share with the group. Now I can do this only when I newly created the group but after one logout the add contacts to share with group disappears. It will say there is no group .... However it shows the groups in the panel and when going there they are created. All group members are moderators and it is set to read and write. This is a crucial function for my business to share new contacts with the team. It has worked when I first started using zoho mail but for weeks now it doesn't. I have created numerous groups to test it with the same result every time. As soon as I log out it disappears.
I am the administrator on the account.
Please somebody look into that or advise me how to get this problem fixed.